Rails yield and content_for in partial
layout, partial-views, ruby, ruby-on-rails, yield
Solution
I think I found out why. Rails renders the view in a linear way. It renders the view before partial, then a partial, then the rest of the view. I tested that if you call `content_for?` or render content in a view AFTER rendering the partial - it is OK, if before - content is not present.
And layout is rendered AFTER the view, that is why at that moment content is already available, because the view and the partial is already rendered e.g. directives executed.
Problem
I've got used to use `content_for` and `yield` for my views in order to set the page title and other neat stuff, related to view rendering. And now I got stuck with next scheme: LAYOUT -> VIEW (edit.html.erb) -> PARTIAL (_main.html). That is - view contains a partial. If I define `content_for :view_content_title, "Hello World"` in the partial, it IS accessible in the LAYOUT, but it is NOT in the VIEW - `content_for?(:view_content_title)` Why ? What should I do about it ?