Allow passing stringy booleans as scope args

This implements the solution discussed in #403.

Fixes #403.

CHANGELOG.md

@@ -2,6 +2,13 @@
 This change log was started in August 2014. All notable changes to this project
 henceforth should be documented here.
 
+## Master (Unreleased)
+### Fixed
+
+*   Add support for passing stringy booleans for ransackable scopes. ([pull request](https://github.com/activerecord-hackery/ransack/pull/460)).
+
+    *Josh Kovach*
+
 ## Version 1.5.1 - 2014-10-30
 ### Added
 
@@ -27,14 +34,13 @@ henceforth should be documented here.
 
     *Jon Atack*
 
-
 ## Version 1.5.0 - 2014-10-26
 ### Added
 
 *   Add support for multiple sort fields and default orders in Ransack
     `sort_link` helpers
     ([pull request](https://github.com/activerecord-hackery/ransack/pull/438)).
-   
+
     *Caleb Land*, *James u007*
 
 *   Add tests for `lteq`, `lt`, `gteq` and `gt` predicates. They are also
@@ -44,15 +50,15 @@ henceforth should be documented here.
     *Jon Atack*
 
 *   Add tests for unknown attribute names.
-    
+
     *Joe Yates*
 
 *   Add tests for attribute names containing '_or_' and '_and_'.
-    
+
     *Joe Yates*, *Jon Atack*
 
 *   Add tests for attribute names ending with '_start' and '_end'.
-    
+
     *Jon Atack*, *Timo Schilling*
 
 *   Add tests for `start`, `not_start`, `end` and `not_end` predicates, with
@@ -164,7 +170,7 @@ henceforth should be documented here.
 *   Rewrite much of the Ransack README documentation, including the
     Associations section code examples and the Authorizations section detailing
     how to whitelist attributes, associations, sorts and scopes.
-    
+
     *Jon Atack*
 
 ## Version 1.3.0 - 2014-08-23

README.md

@@ -461,6 +461,8 @@ Employee.search({ active: true, hired_since: '2013-01-01' })
 Employee.search({ salary_gt: 100_000 }, { auth_object: current_user })
 ```
 
+If the `true` value is being passed via url params or by some other mechanism that will convert it to a string (i.e. `"active" => "true"`), the true value will *not* be passed to the scope. If you want to pass a `'true'` string to the scope, you should wrap it in an array (i.e. `"active" => ['true']`).
+
 Scopes are a recent addition to Ransack and currently have a few caveats:
 First, a scope involving child associations needs to be defined in the parent
 table model, not in the child model. Second, scopes with an array as an
@@ -470,9 +472,7 @@ wrapped in an array to function (see
 which is not compatible with Ransack form helpers. For this use case, it may be
 better for now to use [ransackers]
 (https://github.com/activerecord-hackery/ransack/wiki/Using-Ransackers) instead
-where feasible. Finally, there is also
-[this issue](https://github.com/activerecord-hackery/ransack/issues/403)
-to be aware of. Pull requests with solutions and tests are welcome!
+where feasible. Pull requests with solutions and tests are welcome!
 
 ### Grouping queries by OR instead of AND
 

lib/ransack/search.rb

@@ -125,7 +125,17 @@ module Ransack
       else
         @scope_args[key] = args
       end
-      @context.chain_scope(key, args)
+      @context.chain_scope(key, scope_args(args))
+    end
+
+    def scope_args(args)
+      if Ransack::Constants::TRUE_VALUES.include? args
+        true
+      elsif Ransack::Constants::FALSE_VALUES.include? args
+        false
+      else
+        args
+      end
     end
 
     def collapse_multiparameter_attributes!(attrs)

spec/ransack/adapters/active_record/base_spec.rb

@@ -28,6 +28,11 @@ module Ransack
               search.result.to_sql.should include "active = 1"
             end
 
+            it "applies stringy true scopes" do
+              search = Person.search('active' => 'true')
+              search.result.to_sql.should include "active = 1"
+            end
+
             it "ignores unlisted scopes" do
               search = Person.search('restricted' => true)
               search.result.to_sql.should_not include "restricted"
@@ -38,6 +43,11 @@ module Ransack
               search.result.to_sql.should_not include "active"
             end
 
+            it "ignores stringy false scopes" do
+              search = Person.search('active' => 'false')
+              search.result.to_sql.should_not include "active"
+            end
+
             it "passes values to scopes" do
               search = Person.search('over_age' => 18)
               search.result.to_sql.should include "age > 18"