I have a many to many relationship in rails. All database tables are named accordingly and appropriately. All model files are plural and use underscore to seperate words. All naming comventions are followed by ruby and rails standards. I'm using has many through in my models like this:

has_many :users, :through => :users_posts #Post model
has_many :posts, :through => :users_posts #User model
belongs_to :users #UsersSource model
belongs_to :posts #UsersSource model

What else could this error be from?

ActiveRecord::HasManyThroughAssociationNotFoundError in UsersController#welcome Could not find the association :users_posts in model Post

ruby-on-rails activerecord many-to-many associations has-many-through
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