Controller loop for has_many_through associations
I have the current models setup in my Rails app:
Recipe
has_many :items, :through => :item_linkers
has_many :item_linkers, inverse_of: :recipe
ItemLinker
belongs_to: recipe, inverse_of: :item_linkers
belongs_to: item, inverse_of: :item_linkers
Item
has_many :recipes, through: :item_linkers
has_many :item_linkers, inverse_of: :item
In my show page I currently display all recipes that use a particular ingredient like this:
<% @item.item_linkers.each do |item_linker| %>
<% item_linker.recipe.name %>
<% end %>
This is not the most elegant way imo and would like to do something like this in the controller:
@recipes = @item.recipes
Followed by this in the show page:
<% @recipes.each do |recipe| %>
<% recipe.name %>
<% end %>
But that doesn't seem to work. I get the following error. Any solutions on achieving this?
Cannot have a has_many :through association 'Item#recipes' which goes through 'Item#item_linkers' before the through association is defined.
Can you try changing the order of your has_many
?
Like this:
has_many :item_linkers, inverse_of: :item
has_many :recipes, through: :item_linkers
Instead of:
has_many :items, :through => :item_linkers
has_many :item_linkers, inverse_of: :recipe
References:
https://github.com/rails/rails/issues/29123
https://stackoverflow.com/questions/44013983/activerecordhasmanythroughordererror
Let me know if that helps :)