: dependent =>: destroy does not call the destroy method before deleting?

Question

I have a note model with the following association

note.rb

has_many :note_categories, :dependent => :destroy
has_many :categories, :through => :note_categories

The NoteCategory model was created to work as a table of links between notes and categories. Originally it was only a model / table, but I created a controller to do some custom things when someone removes a category from a note.

note_categories_controller.rb

def destroy
    p "in notes_categories_controller destroy"
    note_category_to_delete = NoteCategory.find(params[:id])
    #some custom stuff
    note_category_to_delete.destroy
    respond_to do |format|
        format.html { redirect_to(notes_url }
        format.xml  { head :ok }
    end
end

This works great because I can use this link to create a button that will remove the category from the note:

<%= button_to 'Remove', note_category, :confirm => 'Are you sure?', :controller => :note_categories, :method => :delete %>

and it works great.

, , note_category, , , destroy . , , . :

Note Load (0.7ms)   SELECT * FROM "notes" WHERE ("notes"."id" = 245) 
NoteCategory Load (0.5ms)   SELECT * FROM "note_categories" WHERE ("note_categories".note_id = 245) 
NoteCategory Destroy (0.3ms)   DELETE FROM "note_categories" WHERE "id" = 146
Note Destroy (0.2ms)   DELETE FROM "notes" WHERE "id" = 245

, : depend = > : destroy, destroy NoteCategories . ?

Answer 1

:dependent => :destroy destroy .

:

: , destroy.

, , - _ , destroy NoteCategory , after_destroy/before_destroy.

:dependent => :destroy , , puts .