RoR differences between :url, :action, :method in form_for
There might be answers in documentation, but i don't seem to find good answers. So among the three :url, :action, :method, what are their differences when used in form_for in Rails?
Answer
Difference between :url, :action and :method
:url
If you want to submit your form for any particular controller, any particular action and want to pass some extra parameter (use action that define in controller that you pass on controller )
for example
<%= form_for @post, :url => {:controller => "your-controller-name", :action => "your-action-name"} do |f| %>
In the above code the form is submitted to that controller(that you pass on url) and goto that (you pass on action) action. it will take defaults to the current action.
now suppose you want to pass extra parameter then for example
form_for @post, :url => { :action => :update, :type => @type, :this => @currently_editing } do |f| ...
you can pass extra parameter like :type => @type
so :url is The URL the form is submitted to. It takes the same fields you pass to url_for or link_to. In particular you may pass here a named route directly as well.
:action
form_for @post, :url => { :action => :update, :type => @type, :this => @currently_editing } do |f| ...
In the above example we pass :action if we want to submit the form in different action then we pass :action and your-action-name the form is post to that action
:method
method is used for which method you want to pass for that action. There are several methods like put,post,get ...
for example
form_for @post, :url => post_path(@post), :method => :put, ....
In the above form_for we pass :method => :put when this form is submit it will use put method