angular rails form

gistfile1.html

Angular form post

Started PUT "/api/v1/articles/3" for 127.0.0.1 at 2014-06-02 07:18:52 +0900
Processing by Api::V1::ArticlesController#update as HTML
Parameters: {"title"=>"puy98y89y", "body"=>"asdfasdfsdfds\nkjlj", "id"=>"3", "categories"=>[{"name"=>"OOP", "id"=>6}], "category_ids"=>[2, 3, 4], "article"=>{"id"=>"3", "title"=>"puy98y89y", "body"=>"asdfasdfsdfds\nkjlj"}}

form:

<form name="newArticleForm" ng-submit="newArticleForm.$valid && postArticle(activeArticle)" novalidate>
	<label>Article Title</label>
	<input type="text" ng-model="activeArticle.title" name="articleTitle" class="form-control" required>
	
	<label>Body</label>
	<textarea name="articleBody" rows='12' ng-model="activeArticle.body" class="form-control" required></textarea>

	<label>Categories</label>

	<select multiple="true" ng-model="activeArticle.category_ids" style="width:200px;"
	  ng-options="category.id as category.name for category in categories">
	</select><br/>
	
	<input type="submit" class="btn btn-primary" value="Post it!">
	
</form>


Rails controller strong params:

			private
			  def article_params
			  	params.require(:article).permit(:title, :body, :id,
			  	 category_ids: [])
			  end