query custom_fields and output them for planning_elements and projects

app/controllers/api/v2/custom_fields_controller.rb

@@ -0,0 +1,27 @@
+module Api
+  module V2
+    class CustomFieldsController < ApplicationController
+
+      include ::Api::V2::ApiController
+
+      def index
+        @custom_fields = CustomField.find :all,
+            :offset => params[:offset],
+            :limit => params[:limit]
+
+        respond_to do |format|
+          format.api
+        end
+      end
+
+      def show
+        @custom_field = CustomField.find params[:id]
+
+        respond_to do |format|
+          format.api
+        end
+      end
+
+    end
+  end
+end

app/helpers/planning_elements_helper.rb

@@ -79,6 +79,9 @@ module PlanningElementsHelper
 
       api.created_at(planning_element.created_at.utc) if planning_element.created_at
       api.updated_at(planning_element.updated_at.utc) if planning_element.updated_at
+
+      render :partial => '/api/v2/custom_fields/custom_field_values.api',
+          :locals => {:custom_field_values => planning_element.custom_field_values}
     end
   end
 

app/views/api/v2/custom_fields/_custom_field.api.rsb

@@ -0,0 +1,26 @@
+api.custom_field do
+  api.id              custom_field.id
+  api.name            custom_field.name
+  api.customized_type custom_field.type.gsub(/CustomField$/, '').underscore
+  api.field_format    custom_field.field_format
+  api.regexp          custom_field.regexp
+  api.min_length      custom_field.min_length
+  api.max_length      custom_field.max_length
+  api.is_required     custom_field.is_required
+  api.is_filter       custom_field.is_filter
+  api.searchable      custom_field.searchable
+  api.is_for_all      custom_field.is_for_all
+  api.position        custom_field.position
+  api.editable        custom_field.editable
+  api.visible         custom_field.visible
+
+  if custom_field.field_format == 'list' && !custom_field.possible_values.empty?
+    api.array :possible_values, api_meta(:size => custom_field.possible_values.size) do
+      custom_field.possible_values.each do |possible_value|
+        api.possible_value do
+          api.value possible_value
+        end
+      end
+    end
+  end
+end

app/views/api/v2/custom_fields/_custom_field_value.api.rsb

@@ -0,0 +1,5 @@
+api.custom_field do
+  api.name  custom_field_value.custom_field.name
+  api.value custom_field_value.value
+  api.id    custom_field_value.custom_field.id
+end

app/views/api/v2/custom_fields/_custom_field_values.api.rsb

@@ -0,0 +1,6 @@
+api.array :custom_fields, api_meta(:size => custom_field_values.size) do
+  custom_field_values.each do |custom_field_value|
+    render :partial => '/api/v2/custom_fields/custom_field_value.api',
+        :locals => {:custom_field_value => custom_field_value}
+  end
+end

app/views/api/v2/custom_fields/index.api.rsb

@@ -0,0 +1,5 @@
+api.array :custom_fields, api_meta(:size => @custom_fields.size) do
+  @custom_fields.each do |custom_field|
+    render :partial => '/api/v2/custom_fields/custom_field.api', :object => custom_field
+  end
+end

app/views/api/v2/custom_fields/show.api.rsb

@@ -0,0 +1 @@
+render :partial => '/api/v2/custom_fields/custom_field.api', :object => @custom_field

config/routes.rb

@@ -81,6 +81,7 @@ OpenProject::Application.routes.draw do
         resources :statuses, :only => [:index, :show]
       end
 
+      resources :custom_fields
 
       namespace :pagination, :as => 'paginate' do
         [:users,
@@ -93,6 +94,7 @@ OpenProject::Application.routes.draw do
           resources model, :only => [:index]
         end
       end
+
     end
   end