Rails - Partial in another view can't access its controller -

i'm trying build profile page displays posts sent requested user, , allows visitor write post of own. because simplified example should have 2 distinct controllers: users , posts, made partials each post action render within user's show action.

directory structure views directory looks this:

- posts   - _index.html.erb   - _new.html.erb  - users   - show.html.erb   ... (etc.) 

section displays these partials within user's show.html.erb:

<section>     <h3>posts:</h3>     <%= render '/posts/new', :post => post.new %>     <%= render '/posts/index', :posts => post.where(target_id: params[:id]) %> </section> 

i found out pass variables partial in render line, , though works, it's messy , doesn't follow best practices.

ideally, i'd want these partials connected posts controller can write more complex database queries in place isn't view:

class postscontroller < applicationcontroller def new     @post = post.new end  def index     @posts = post.where(target_id: params[:id]) end  def create     @post = post.new(post_params)        @post.user_id = current_user.id     @post.target_id = params[:post][:target_id]      if @post.save         redirect_to :back, notice: 'you published post!'     else         render new     end end  private     def post_params         params.require(:post).permit(:body)     end end 

currently, haven't found way of doing this. know newb question, in advance.

you attempting treat controllers models: doing post work in post controller , user work in user controller. controllers task-oriented, not model-oriented.

since want posts info in user form, it's typical gather in user controller. e.g.

class userscontroller < applicationcontroller   def show     ...     @posts = post.where(user_id: user.id)   end end 

that @posts instance variable visible in show template , partials calls. many coders prefer send explicitly through render arguments, more functional:

<%= render '/posts/post_list', posts: @posts %> 

for 1 thing it's easier refactor when can see @ glance of partial's dependencies.