From 5b401947c99ad17bc5a20a02857c7da75a757dab Mon Sep 17 00:00:00 2001
From: Peter Fern <github@obfusc8.org>
Date: Tue, 10 Dec 2013 20:57:26 +1100
Subject: [PATCH] Allow specifying default attribute and predicate via
 options[:default]

Affects `predicate_select` and `attribute_select`
---
 lib/ransack/helpers/form_builder.rb | 10 +++++++++-
 lib/ransack/nodes/condition.rb      |  9 ++-------
 lib/ransack/nodes/grouping.rb       |  3 +--
 3 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/lib/ransack/helpers/form_builder.rb b/lib/ransack/helpers/form_builder.rb
index 79dd213..b944713 100644
--- a/lib/ransack/helpers/form_builder.rb
+++ b/lib/ransack/helpers/form_builder.rb
@@ -24,15 +24,20 @@ module Ransack
         options = options || {}
         html_options = html_options || {}
         action = action || 'search'
+        default = options.delete(:default)
         raise ArgumentError, formbuilder_error_message(
           "#{action}_select") unless object.respond_to?(:context)
         options[:include_blank] = true unless options.has_key?(:include_blank)
         bases = [''] + association_array(options[:associations])
         if bases.size > 1
           collection = attribute_collection_for_bases(action, bases)
+          object.name ||= default if object.respond_to?(:name=) && default &&
+            collection.flatten(2).map{|a| a.is_a?(Array) ? a.first : nil}.compact.include?(default.to_s)
           template_grouped_collection_select(collection, options, html_options)
         else
           collection = collection_for_base(action, bases.first)
+          object.name ||= default if object.respond_to?(:name=) && default &&
+            collection.map{|a| a.is_a?(Array) ? a.first : nil}.compact.include?(default.to_s)
           template_collection_select(:name, collection, options, html_options)
         end
       end
@@ -96,6 +101,7 @@ module Ransack
 
       def predicate_select(options = {}, html_options = {})
         options[:compounds] = true if options[:compounds].nil?
+        default = options.delete(:default) || 'eq'
         keys = options[:compounds] ? Predicate.names : 
           Predicate.names.reject { |k| k.match(/_(any|all)$/) }
         if only = options[:only]
@@ -107,6 +113,8 @@ module Ransack
           end
         end
         collection = keys.map { |k| [k, Translate.predicate(k)] }
+        object.predicate ||= Predicate.named(default) if object.respond_to?(:predicate=) &&
+          default && keys.include?(default.to_s)
         template_collection_select(:p, collection, options, html_options)
       end
 
@@ -211,4 +219,4 @@ module Ransack
 
     end
   end
-end
\ No newline at end of file
+end
diff --git a/lib/ransack/nodes/condition.rb b/lib/ransack/nodes/condition.rb
index 07feaf2..1f11429 100644
--- a/lib/ransack/nodes/condition.rb
+++ b/lib/ransack/nodes/condition.rb
@@ -4,7 +4,7 @@ module Ransack
       i18n_word :attribute, :predicate, :combinator, :value
       i18n_alias :a => :attribute, :p => :predicate, :m => :combinator, :v => :value
 
-      attr_reader :predicate
+      attr_accessor :predicate
 
       class << self
         def extract(context, key, values)
@@ -152,11 +152,6 @@ module Ransack
       end
       alias :p= :predicate_name=
 
-      def predicate=(predicate)
-        @predicate = predicate
-        predicate
-      end
-
       def predicate_name
         predicate.name if predicate
       end
@@ -216,4 +211,4 @@ module Ransack
 
     end
   end
-end
\ No newline at end of file
+end
diff --git a/lib/ransack/nodes/grouping.rb b/lib/ransack/nodes/grouping.rb
index 08a0d6a..a7d81b0 100644
--- a/lib/ransack/nodes/grouping.rb
+++ b/lib/ransack/nodes/grouping.rb
@@ -84,7 +84,6 @@ module Ransack
         attrs = opts[:attributes] || 1
         vals = opts[:values] || 1
         condition = Condition.new(@context)
-        condition.predicate = Predicate.named('eq')
         attrs.times { condition.build_attribute }
         vals.times { condition.build_value }
         condition
@@ -196,4 +195,4 @@ module Ransack
 
     end
   end
-end
\ No newline at end of file
+end