2009-11-18 18:50:43 -05:00
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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
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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, :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 :select, :radio, :check_boxes, :to => SimpleForm::Inputs::CollectionInput
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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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2011-04-27 14:55:03 -04:00
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def self.discovery_cache
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@discovery_cache ||= {}
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end
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2009-12-10 22:18:56 -05:00
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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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# == 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]" size="100" 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 and :select inputs), you have three extra
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# 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 respectivelly.
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#
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def input(attribute_name, options={}, &block)
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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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if block_given?
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SimpleForm.components.render SimpleForm::Inputs::BlockInput.new(self, attribute_name, column, input_type, options, &block)
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else
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SimpleForm.components.render find_mapping(input_type).new(self, attribute_name, column, input_type, options)
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end
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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]" size="100" type="text" value="Carlos" />
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#
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def input_field(attribute_name, options={})
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options[:input_html] = options.except(:as, :collection, :label_method, :value_method)
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options.merge!(:components => [:input], :wrapper => false)
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input(attribute_name, options)
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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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def association(association, options={}, &block)
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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] ||= reflection.klass.all(reflection.options.slice(:conditions, :order))
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attribute = case reflection.macro
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when :belongs_to
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reflection.options[:foreign_key] || :"#{reflection.name}_id"
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when :has_one
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raise ":has_one associations are not supported by f.association"
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else
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if options[:as] == :select
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html_options = options[:input_html] ||= {}
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html_options[:size] ||= 5
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html_options[:multiple] = true unless html_options.key?(:multiple)
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end
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2011-05-16 22:17:09 -04:00
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# Force the association to be preloaded for performance.
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if options[:preload] != false && object.respond_to?(association)
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target = object.send(association)
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target.to_a if target.respond_to?(:to_a)
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end
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:"#{reflection.name.to_s.singularize}_ids"
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end
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input(attribute, options.merge(:reflection => reflection))
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end
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2009-12-10 15:03:27 -05:00
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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.
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#
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def button(type, *args, &block)
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options = args.extract_options!
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options[:class] = "button #{options[:class]}".strip
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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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2009-12-10 12:57:24 -05:00
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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[: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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2011-09-02 14:33:03 -04:00
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SimpleForm::Wrappers.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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2011-04-27 15:58:59 -04:00
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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[: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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2009-12-10 16:52:23 -05:00
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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[:hint_html] = options.except(:hint_tag)
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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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2011-09-02 14:45:17 -04:00
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SimpleForm::Wrappers.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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2009-12-10 12:57:24 -05:00
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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)
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options = args.extract_options!
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options[:label_html] = options.dup
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options[:label] = options.delete(:label)
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options[:required] = options.delete(:required)
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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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2009-12-10 10:49:17 -05:00
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end
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2010-07-06 16:29:26 -04:00
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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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2009-12-09 20:57:05 -05:00
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private
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2009-12-08 11:49:14 -05:00
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2009-12-10 12:57:24 -05:00
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# Attempt to guess the better input type given the defined options. By
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# default alwayls fallback to the user :as option, or to a :select when a
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# collection is given.
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2010-10-18 17:14:07 -04:00
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def default_input_type(attribute_name, column, options) #:nodoc:
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return options[:as].to_sym if options[:as]
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2010-11-25 19:35:38 -05:00
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return :select if options[:collection]
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2011-02-03 20:42:17 -05:00
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custom_type = find_custom_type(attribute_name.to_s) and return custom_type
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2011-02-03 11:06:33 -05:00
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2010-10-18 17:14:07 -04:00
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input_type = column.try(:type)
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2009-12-09 20:57:05 -05:00
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case input_type
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2011-02-07 20:25:09 -05:00
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when :timestamp
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:datetime
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when :string, nil
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case attribute_name.to_s
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when /password/ then :password
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when /time_zone/ then :time_zone
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when /country/ then :country
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when /email/ then :email
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when /phone/ then :tel
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when /url/ then :url
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2009-12-09 20:57:05 -05:00
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else
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2011-02-07 20:25:09 -05:00
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file_method?(attribute_name) ? :file : (input_type || :string)
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end
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else
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input_type
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2009-12-08 11:49:14 -05:00
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end
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2009-12-09 20:57:05 -05:00
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end
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2009-12-08 14:08:36 -05:00
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2011-02-07 06:20:47 -05:00
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def find_custom_type(attribute_name) #:nodoc:
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2011-02-03 11:06:33 -05:00
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|
SimpleForm.input_mappings.find { |match, type|
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2011-02-03 20:42:17 -05:00
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|
attribute_name =~ match
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|
}.try(:last) if SimpleForm.input_mappings
|
2011-02-03 11:06:33 -05:00
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|
end
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2010-10-18 17:14:07 -04:00
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|
def file_method?(attribute_name) #:nodoc:
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|
file = @object.send(attribute_name) if @object.respond_to?(attribute_name)
|
2011-02-07 06:20:47 -05:00
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|
file && SimpleForm.file_methods.any? { |m| file.respond_to?(m) }
|
2009-12-11 08:12:57 -05:00
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|
end
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|
2010-10-18 17:14:07 -04:00
|
|
|
def find_attribute_column(attribute_name) #:nodoc:
|
2011-02-03 20:42:17 -05:00
|
|
|
if @object.respond_to?(:column_for_attribute)
|
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|
|
@object.column_for_attribute(attribute_name)
|
|
|
|
end
|
2009-12-10 08:57:05 -05:00
|
|
|
end
|
|
|
|
|
2009-12-13 16:16:00 -05:00
|
|
|
def find_association_reflection(association) #:nodoc:
|
2011-02-03 20:42:17 -05:00
|
|
|
if @object.class.respond_to?(:reflect_on_association)
|
|
|
|
@object.class.reflect_on_association(association)
|
|
|
|
end
|
2009-12-10 21:18:14 -05:00
|
|
|
end
|
2011-04-27 14:55:03 -04:00
|
|
|
|
|
|
|
# Attempts to find a mapping. It follows the following rules:
|
|
|
|
#
|
|
|
|
# 1) It tries to find a registered mapping, if succeeds:
|
2011-04-27 16:00:00 -04:00
|
|
|
# a) Try to find an alternative with the same name in the Object scope
|
2011-04-27 14:55:03 -04:00
|
|
|
# b) Or use the found mapping
|
|
|
|
# 2) If not, fallbacks to #{input_type}Input
|
2011-05-05 21:35:19 -04:00
|
|
|
# 3) If not, fallbacks to SimpleForm::Inputs::#{input_type}Input
|
2011-04-27 14:55:03 -04:00
|
|
|
def find_mapping(input_type) #:nodoc:
|
|
|
|
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(camelized, Object) || attempt_mapping(camelized, self.class) ||
|
|
|
|
raise("No input found for #{input_type}")
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
|
|
|
# If cache_discovery is enabled, use the class level cache that persists
|
|
|
|
# between requests, otherwise use the instance one.
|
|
|
|
def discovery_cache #:nodoc:
|
|
|
|
if SimpleForm.cache_discovery
|
|
|
|
self.class.discovery_cache
|
|
|
|
else
|
|
|
|
@discovery_cache ||= {}
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
|
|
|
def mapping_override(klass) #:nodoc:
|
|
|
|
name = klass.name
|
|
|
|
if name =~ /^SimpleForm::Inputs/
|
2011-04-27 15:26:02 -04:00
|
|
|
attempt_mapping name.split("::").last, Object
|
2011-04-27 14:55:03 -04:00
|
|
|
end
|
|
|
|
end
|
|
|
|
|
|
|
|
def attempt_mapping(mapping, at) #:nodoc:
|
|
|
|
return if SimpleForm.inputs_discovery == false && at == Object
|
|
|
|
|
|
|
|
begin
|
|
|
|
at.const_get(mapping)
|
|
|
|
rescue NameError => e
|
|
|
|
e.message =~ /#{mapping}$/ ? nil : raise
|
|
|
|
end
|
|
|
|
end
|
2009-11-18 18:50:43 -05:00
|
|
|
end
|
|
|
|
end
|