646 lines
25 KiB
Ruby
646 lines
25 KiB
Ruby
# frozen_string_literal: true
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require 'active_support/core_ext/object/deep_dup'
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require 'simple_form/map_type'
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require 'simple_form/tags'
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module SimpleForm
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class FormBuilder < ActionView::Helpers::FormBuilder
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attr_reader :template, :object_name, :object, :wrapper
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# When action is create or update, we still should use new and edit
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ACTIONS = {
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'create' => 'new',
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'update' => 'edit'
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}
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ATTRIBUTE_COMPONENTS = [:html5, :min_max, :maxlength, :minlength, :placeholder, :pattern, :readonly]
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extend MapType
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include SimpleForm::Inputs
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map_type :text, to: SimpleForm::Inputs::TextInput
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map_type :file, to: SimpleForm::Inputs::FileInput
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map_type :string, :email, :search, :tel, :url, :uuid, to: SimpleForm::Inputs::StringInput
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map_type :password, to: SimpleForm::Inputs::PasswordInput
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map_type :integer, :decimal, :float, to: SimpleForm::Inputs::NumericInput
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map_type :range, to: SimpleForm::Inputs::RangeInput
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map_type :check_boxes, to: SimpleForm::Inputs::CollectionCheckBoxesInput
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map_type :radio_buttons, to: SimpleForm::Inputs::CollectionRadioButtonsInput
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map_type :select, to: SimpleForm::Inputs::CollectionSelectInput
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map_type :grouped_select, to: SimpleForm::Inputs::GroupedCollectionSelectInput
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map_type :date, :time, :datetime, to: SimpleForm::Inputs::DateTimeInput
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map_type :country, :time_zone, to: SimpleForm::Inputs::PriorityInput
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map_type :boolean, to: SimpleForm::Inputs::BooleanInput
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map_type :hidden, to: SimpleForm::Inputs::HiddenInput
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def self.discovery_cache
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@discovery_cache ||= {}
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end
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def initialize(*) #:nodoc:
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super
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@defaults = options[:defaults]
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@wrapper = SimpleForm.wrapper(options[:wrapper] || SimpleForm.default_wrapper)
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end
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# Basic input helper, combines all components in the stack to generate
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# input html based on options the user define and some guesses through
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# database column information. By default a call to input will generate
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# label + input + hint (when defined) + errors (when exists), and all can
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# be configured inside a wrapper html.
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#
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# If a block is given, the contents of the block will replace the input
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# field that would otherwise be generated automatically. The content will
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# be given a label and wrapper div to make it consistent with the other
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# elements in the form.
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#
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# == Examples
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#
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# # Imagine @user has error "can't be blank" on name
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# simple_form_for @user do |f|
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# f.input :name, hint: 'My hint'
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# end
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#
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# This is the output html (only the input portion, not the form):
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#
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# <label class="string required" for="user_name">
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# <abbr title="required">*</abbr> Super User Name!
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# </label>
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# <input class="string required" id="user_name" maxlength="100"
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# name="user[name]" type="text" value="Carlos" />
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# <span class="hint">My hint</span>
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# <span class="error">can't be blank</span>
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#
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# Each database type will render a default input, based on some mappings and
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# heuristic to determine which is the best option.
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#
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# You have some options for the input to enable/disable some functions:
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#
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# as: allows you to define the input type you want, for instance you
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# can use it to generate a text field for a date column.
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#
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# required: defines whether this attribute is required or not. True
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# by default.
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#
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# The fact SimpleForm is built in components allow the interface to be unified.
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# So, for instance, if you need to disable :hint for a given input, you can pass
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# hint: false. The same works for :error, :label and :wrapper.
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#
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# Besides the html for any component can be changed. So, if you want to change
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# the label html you just need to give a hash to :label_html. To configure the
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# input html, supply :input_html instead and so on.
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#
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# == Options
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#
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# Some inputs, as datetime, time and select allow you to give extra options, like
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# prompt and/or include blank. Such options are given in plainly:
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#
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# f.input :created_at, include_blank: true
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#
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# == Collection
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#
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# When playing with collections (:radio_buttons, :check_boxes and :select
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# inputs), you have three extra options:
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#
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# collection: use to determine the collection to generate the radio or select
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#
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# label_method: the method to apply on the array collection to get the label
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#
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# value_method: the method to apply on the array collection to get the value
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#
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# == Priority
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#
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# Some inputs, as :time_zone and :country accepts a :priority option. If none is
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# given SimpleForm.time_zone_priority and SimpleForm.country_priority are used respectively.
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#
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def input(attribute_name, options = {}, &block)
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options = @defaults.deep_dup.deep_merge(options) if @defaults
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input = find_input(attribute_name, options, &block)
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wrapper = find_wrapper(input.input_type, options)
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wrapper.render input
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end
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alias :attribute :input
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# Creates a input tag for the given attribute. All the given options
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# are sent as :input_html.
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#
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# == Examples
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#
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# simple_form_for @user do |f|
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# f.input_field :name
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# end
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#
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# This is the output html (only the input portion, not the form):
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#
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# <input class="string required" id="user_name" maxlength="100"
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# name="user[name]" type="text" value="Carlos" />
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#
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def input_field(attribute_name, options = {})
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components = (wrapper.components.map(&:namespace) & ATTRIBUTE_COMPONENTS)
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options = options.dup
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options[:input_html] = options.except(:as, :boolean_style, :collection, :label_method, :value_method, :prompt, *components)
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options = @defaults.deep_dup.deep_merge(options) if @defaults
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input = find_input(attribute_name, options)
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wrapper = find_wrapper(input.input_type, options)
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components = components.concat([:input]).map { |component| SimpleForm::Wrappers::Leaf.new(component) }
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SimpleForm::Wrappers::Root.new(components, wrapper.options.merge(wrapper: false)).render input
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end
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# Helper for dealing with association selects/radios, generating the
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# collection automatically. It's just a wrapper to input, so all options
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# supported in input are also supported by association. Some extra options
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# can also be given:
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#
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# == Examples
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#
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# simple_form_for @user do |f|
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# f.association :company # Company.all
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# end
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#
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# f.association :company, collection: Company.all(order: 'name')
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# # Same as using :order option, but overriding collection
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#
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# == Block
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#
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# When a block is given, association simple behaves as a proxy to
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# simple_fields_for:
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#
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# f.association :company do |c|
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# c.input :name
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# c.input :type
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# end
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#
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# From the options above, only :collection can also be supplied.
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#
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# Please note that the association helper is currently only tested with Active Record. Depending on the ORM you are using your mileage may vary.
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#
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def association(association, options = {}, &block)
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options = options.dup
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return simple_fields_for(*[association,
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options.delete(:collection), options].compact, &block) if block_given?
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raise ArgumentError, "Association cannot be used in forms not associated with an object" unless @object
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reflection = find_association_reflection(association)
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raise "Association #{association.inspect} not found" unless reflection
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options[:as] ||= :select
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options[:collection] ||= fetch_association_collection(reflection, options)
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attribute = build_association_attribute(reflection, association, options)
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input(attribute, options.merge(reflection: reflection))
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end
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# Creates a button:
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#
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# form_for @user do |f|
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# f.button :submit
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# end
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#
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# It just acts as a proxy to method name given. We also alias original Rails
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# button implementation (3.2 forward (to delegate to the original when
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# calling `f.button :button`.
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#
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alias_method :button_button, :button
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def button(type, *args, &block)
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options = args.extract_options!.dup
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options[:class] = [SimpleForm.button_class, options[:class]].compact
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args << options
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if respond_to?(:"#{type}_button")
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send(:"#{type}_button", *args, &block)
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else
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send(type, *args, &block)
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end
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end
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# Creates an error tag based on the given attribute, only when the attribute
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# contains errors. All the given options are sent as :error_html.
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#
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# == Examples
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#
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# f.error :name
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# f.error :name, id: "cool_error"
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#
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def error(attribute_name, options = {})
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options = options.dup
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options[:error_html] = options.except(:error_tag, :error_prefix, :error_method)
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column = find_attribute_column(attribute_name)
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input_type = default_input_type(attribute_name, column, options)
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wrapper.find(:error).
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render(SimpleForm::Inputs::Base.new(self, attribute_name, column, input_type, options))
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end
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# Return the error but also considering its name. This is used
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# when errors for a hidden field need to be shown.
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#
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# == Examples
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#
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# f.full_error :token #=> <span class="error">Token is invalid</span>
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#
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def full_error(attribute_name, options = {})
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options = options.dup
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options[:error_prefix] ||= if object.class.respond_to?(:human_attribute_name)
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object.class.human_attribute_name(attribute_name.to_s)
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else
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attribute_name.to_s.humanize
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end
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error(attribute_name, options)
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end
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# Creates a hint tag for the given attribute. Accepts a symbol indicating
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# an attribute for I18n lookup or a string. All the given options are sent
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# as :hint_html.
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#
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# == Examples
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#
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# f.hint :name # Do I18n lookup
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# f.hint :name, id: "cool_hint"
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# f.hint "Don't forget to accept this"
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#
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def hint(attribute_name, options = {})
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options = options.dup
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options[:hint_html] = options.except(:hint_tag, :hint)
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if attribute_name.is_a?(String)
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options[:hint] = attribute_name
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attribute_name, column, input_type = nil, nil, nil
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else
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column = find_attribute_column(attribute_name)
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input_type = default_input_type(attribute_name, column, options)
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end
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wrapper.find(:hint).
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render(SimpleForm::Inputs::Base.new(self, attribute_name, column, input_type, options))
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end
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# Creates a default label tag for the given attribute. You can give a label
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# through the :label option or using i18n. All the given options are sent
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# as :label_html.
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#
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# == Examples
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#
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# f.label :name # Do I18n lookup
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# f.label :name, "Name" # Same behavior as Rails, do not add required tag
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# f.label :name, label: "Name" # Same as above, but adds required tag
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#
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# f.label :name, required: false
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# f.label :name, id: "cool_label"
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#
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def label(attribute_name, *args)
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return super if args.first.is_a?(String) || block_given?
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options = args.extract_options!.dup
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options[:label_html] = options.except(:label, :label_text, :required, :as)
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column = find_attribute_column(attribute_name)
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input_type = default_input_type(attribute_name, column, options)
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SimpleForm::Inputs::Base.new(self, attribute_name, column, input_type, options).label
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end
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# Creates an error notification message that only appears when the form object
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# has some error. You can give a specific message with the :message option,
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# otherwise it will look for a message using I18n. All other options given are
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# passed straight as html options to the html tag.
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#
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# == Examples
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#
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# f.error_notification
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# f.error_notification message: 'Something went wrong'
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# f.error_notification id: 'user_error_message', class: 'form_error'
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#
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def error_notification(options = {})
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SimpleForm::ErrorNotification.new(self, options).render
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end
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# Create a collection of radio inputs for the attribute. Basically this
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# helper will create a radio input associated with a label for each
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# text/value option in the collection, using value_method and text_method
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# to convert these text/value. You can give a symbol or a proc to both
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# value_method and text_method, that will be evaluated for each item in
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# the collection.
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#
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# == Examples
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#
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# form_for @user do |f|
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# f.collection_radio_buttons :options, [[true, 'Yes'] ,[false, 'No']], :first, :last
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# end
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#
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# <input id="user_options_true" name="user[options]" type="radio" value="true" />
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# <label class="collection_radio_buttons" for="user_options_true">Yes</label>
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# <input id="user_options_false" name="user[options]" type="radio" value="false" />
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# <label class="collection_radio_buttons" for="user_options_false">No</label>
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#
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# It is also possible to give a block that should generate the radio +
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# label. To wrap the radio with the label, for instance:
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#
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# form_for @user do |f|
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# f.collection_radio_buttons(
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# :options, [[true, 'Yes'] ,[false, 'No']], :first, :last
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# ) do |b|
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# b.label { b.radio_button + b.text }
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# end
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# end
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#
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# == Options
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#
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# Collection radio accepts some extra options:
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#
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# * checked => the value that should be checked initially.
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#
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# * disabled => the value or values that should be disabled. Accepts a single
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# item or an array of items.
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#
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# * collection_wrapper_tag => the tag to wrap the entire collection.
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#
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# * collection_wrapper_class => the CSS class to use for collection_wrapper_tag
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#
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# * item_wrapper_tag => the tag to wrap each item in the collection.
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#
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# * item_wrapper_class => the CSS class to use for item_wrapper_tag
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#
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# * a block => to generate the label + radio or any other component.
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def collection_radio_buttons(method, collection, value_method, text_method, options = {}, html_options = {}, &block)
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SimpleForm::Tags::CollectionRadioButtons.new(@object_name, method, @template, collection, value_method, text_method, objectify_options(options), @default_options.merge(html_options)).render(&block)
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end
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# Creates a collection of check boxes for each item in the collection,
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# associated with a clickable label. Use value_method and text_method to
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# convert items in the collection for use as text/value in check boxes.
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# You can give a symbol or a proc to both value_method and text_method,
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# that will be evaluated for each item in the collection.
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#
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# == Examples
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#
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# form_for @user do |f|
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# f.collection_check_boxes :options, [[true, 'Yes'] ,[false, 'No']], :first, :last
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# end
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#
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# <input name="user[options][]" type="hidden" value="" />
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# <input id="user_options_true" name="user[options][]" type="checkbox" value="true" />
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# <label class="collection_check_boxes" for="user_options_true">Yes</label>
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# <input name="user[options][]" type="hidden" value="" />
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# <input id="user_options_false" name="user[options][]" type="checkbox" value="false" />
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# <label class="collection_check_boxes" for="user_options_false">No</label>
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#
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# It is also possible to give a block that should generate the check box +
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# label. To wrap the check box with the label, for instance:
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#
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# form_for @user do |f|
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# f.collection_check_boxes(
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# :options, [[true, 'Yes'] ,[false, 'No']], :first, :last
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# ) do |b|
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# b.label { b.check_box + b.text }
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# end
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# end
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#
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# == Options
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#
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# Collection check box accepts some extra options:
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#
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# * checked => the value or values that should be checked initially. Accepts
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# a single item or an array of items. It overrides existing associations.
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#
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# * disabled => the value or values that should be disabled. Accepts a single
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# item or an array of items.
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#
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# * collection_wrapper_tag => the tag to wrap the entire collection.
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#
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# * collection_wrapper_class => the CSS class to use for collection_wrapper_tag. This option
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# is ignored if the :collection_wrapper_tag option is blank.
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#
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# * item_wrapper_tag => the tag to wrap each item in the collection.
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#
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# * item_wrapper_class => the CSS class to use for item_wrapper_tag
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#
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# * a block => to generate the label + check box or any other component.
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def collection_check_boxes(method, collection, value_method, text_method, options = {}, html_options = {}, &block)
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SimpleForm::Tags::CollectionCheckBoxes.new(@object_name, method, @template, collection, value_method, text_method, objectify_options(options), @default_options.merge(html_options)).render(&block)
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end
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# Extract the model names from the object_name mess, ignoring numeric and
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# explicit child indexes.
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#
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# Example:
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#
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# route[blocks_attributes][0][blocks_learning_object_attributes][1][foo_attributes]
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# ["route", "blocks", "blocks_learning_object", "foo"]
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#
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def lookup_model_names #:nodoc:
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@lookup_model_names ||= begin
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child_index = options[:child_index]
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names = object_name.to_s.scan(/(?!\d)\w+/).flatten
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names.delete(child_index) if child_index
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names.each { |name| name.gsub!('_attributes', '') }
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names.freeze
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end
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end
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# The action to be used in lookup.
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def lookup_action #:nodoc:
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@lookup_action ||= begin
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action = template.controller && template.controller.action_name
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return unless action
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action = action.to_s
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ACTIONS[action] || action
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end
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end
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private
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def fetch_association_collection(reflection, options)
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options.fetch(:collection) do
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relation = reflection.klass.all
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if reflection.respond_to?(:scope) && reflection.scope
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relation = reflection.klass.instance_exec(&reflection.scope)
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else
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order = reflection.options[:order]
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conditions = reflection.options[:conditions]
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conditions = object.instance_exec(&conditions) if conditions.respond_to?(:call)
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relation = relation.where(conditions)
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relation = relation.order(order) if relation.respond_to?(:order)
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end
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relation
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end
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end
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def build_association_attribute(reflection, association, options)
|
|
case reflection.macro
|
|
when :belongs_to
|
|
(reflection.respond_to?(:options) && reflection.options[:foreign_key]) || :"#{reflection.name}_id"
|
|
when :has_one
|
|
raise ArgumentError, ":has_one associations are not supported by f.association"
|
|
else
|
|
if options[:as] == :select
|
|
html_options = options[:input_html] ||= {}
|
|
html_options[:multiple] = true unless html_options.key?(:multiple)
|
|
end
|
|
|
|
# Force the association to be preloaded for performance.
|
|
if options[:preload] != false && object.respond_to?(association)
|
|
target = object.send(association)
|
|
target.to_a if target.respond_to?(:to_a)
|
|
end
|
|
|
|
:"#{reflection.name.to_s.singularize}_ids"
|
|
end
|
|
end
|
|
|
|
# Find an input based on the attribute name.
|
|
def find_input(attribute_name, options = {}, &block)
|
|
column = find_attribute_column(attribute_name)
|
|
input_type = default_input_type(attribute_name, column, options)
|
|
|
|
if block_given?
|
|
SimpleForm::Inputs::BlockInput.new(self, attribute_name, column, input_type, options, &block)
|
|
else
|
|
find_mapping(input_type).new(self, attribute_name, column, input_type, options)
|
|
end
|
|
end
|
|
|
|
# Attempt to guess the better input type given the defined options. By
|
|
# default always fallback to the user :as option, or to a :select when a
|
|
# collection is given.
|
|
def default_input_type(attribute_name, column, options)
|
|
return options[:as].to_sym if options[:as]
|
|
custom_type = find_custom_type(attribute_name.to_s) and return custom_type
|
|
return :select if options[:collection]
|
|
|
|
input_type = column.try(:type)
|
|
case input_type
|
|
when :timestamp
|
|
:datetime
|
|
when :string, nil
|
|
case attribute_name.to_s
|
|
when /password/ then :password
|
|
when /time_zone/ then :time_zone
|
|
when /country/ then :country
|
|
when /email/ then :email
|
|
when /phone/ then :tel
|
|
when /url/ then :url
|
|
else
|
|
file_method?(attribute_name) ? :file : (input_type || :string)
|
|
end
|
|
else
|
|
input_type
|
|
end
|
|
end
|
|
|
|
def find_custom_type(attribute_name)
|
|
SimpleForm.input_mappings.find { |match, type|
|
|
attribute_name =~ match
|
|
}.try(:last) if SimpleForm.input_mappings
|
|
end
|
|
|
|
def file_method?(attribute_name)
|
|
file = @object.send(attribute_name) if @object.respond_to?(attribute_name)
|
|
file && SimpleForm.file_methods.any? { |m| file.respond_to?(m) }
|
|
end
|
|
|
|
def find_attribute_column(attribute_name)
|
|
if @object.respond_to?(:type_for_attribute) && @object.has_attribute?(attribute_name)
|
|
@object.type_for_attribute(attribute_name.to_s)
|
|
elsif @object.respond_to?(:column_for_attribute) && @object.has_attribute?(attribute_name)
|
|
@object.column_for_attribute(attribute_name)
|
|
end
|
|
end
|
|
|
|
def find_association_reflection(association)
|
|
if @object.class.respond_to?(:reflect_on_association)
|
|
@object.class.reflect_on_association(association)
|
|
end
|
|
end
|
|
|
|
# Attempts to find a mapping. It follows the following rules:
|
|
#
|
|
# 1) It tries to find a registered mapping, if succeeds:
|
|
# a) Try to find an alternative with the same name in the Object scope
|
|
# b) Or use the found mapping
|
|
# 2) If not, fallbacks to #{input_type}Input
|
|
# 3) If not, fallbacks to SimpleForm::Inputs::#{input_type}Input
|
|
def find_mapping(input_type)
|
|
discovery_cache[input_type] ||=
|
|
if mapping = self.class.mappings[input_type]
|
|
mapping_override(mapping) || mapping
|
|
else
|
|
camelized = "#{input_type.to_s.camelize}Input"
|
|
attempt_mapping_with_custom_namespace(camelized) ||
|
|
attempt_mapping(camelized, Object) ||
|
|
attempt_mapping(camelized, self.class) ||
|
|
raise("No input found for #{input_type}")
|
|
end
|
|
end
|
|
|
|
# Attempts to find a wrapper mapping. It follows the following rules:
|
|
#
|
|
# 1) It tries to find a wrapper for the current form
|
|
# 2) If not, it tries to find a config
|
|
def find_wrapper_mapping(input_type)
|
|
if options[:wrapper_mappings] && options[:wrapper_mappings][input_type]
|
|
options[:wrapper_mappings][input_type]
|
|
else
|
|
SimpleForm.wrapper_mappings && SimpleForm.wrapper_mappings[input_type]
|
|
end
|
|
end
|
|
|
|
def find_wrapper(input_type, options)
|
|
if name = options[:wrapper] || find_wrapper_mapping(input_type)
|
|
name.respond_to?(:render) ? name : SimpleForm.wrapper(name)
|
|
else
|
|
wrapper
|
|
end
|
|
end
|
|
|
|
# If cache_discovery is enabled, use the class level cache that persists
|
|
# between requests, otherwise use the instance one.
|
|
def discovery_cache
|
|
if SimpleForm.cache_discovery
|
|
self.class.discovery_cache
|
|
else
|
|
@discovery_cache ||= {}
|
|
end
|
|
end
|
|
|
|
def mapping_override(klass)
|
|
name = klass.name
|
|
if name =~ /^SimpleForm::Inputs/
|
|
input_name = name.split("::").last
|
|
attempt_mapping_with_custom_namespace(input_name) ||
|
|
attempt_mapping(input_name, Object)
|
|
end
|
|
end
|
|
|
|
def attempt_mapping(mapping, at)
|
|
return if SimpleForm.inputs_discovery == false && at == Object
|
|
|
|
begin
|
|
at.const_get(mapping)
|
|
rescue NameError => e
|
|
raise if e.message !~ /#{mapping}$/
|
|
end
|
|
end
|
|
|
|
def attempt_mapping_with_custom_namespace(input_name)
|
|
SimpleForm.custom_inputs_namespaces.each do |namespace|
|
|
if (mapping = attempt_mapping(input_name, namespace.constantize))
|
|
return mapping
|
|
end
|
|
end
|
|
|
|
nil
|
|
end
|
|
end
|
|
end
|