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PORails How to use has_many_and_belongs_to_many with accepts_nested_attributes_for
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copied!<p>I have two models:</p> <p>Routes and Activity</p> <p>I have a Many-To-Many relationship between them through a migration that looks like:</p> <pre><code>class ActivitiesRoutes < ActiveRecord::Migration def up create_table :activities_routes, :id => false do |t| t.integer :route_id t.integer :activity_id end end end </code></pre> <p>In a rest service i get the data for a route and I get multiple activities, my models look like this:</p> <pre><code>class Route < ActiveRecord::Base attr_accessible :activities_attributes has_and_belongs_to_many :activities accepts_nested_attributes_for :activities end </code></pre> <p>and:</p> <pre><code>class Activity < ActiveRecord::Base attr_accessible :activitytext, :iconid has_and_belongs_to_many :routes end </code></pre> <p>On my app controller I want to make something like :</p> <pre><code>ruta=Route.create({ #other data for the model }) ruta.activities_attributes = @activitiesarray #Array made with the Activities received </code></pre> <p>But I get an error:</p> <pre><code>undefined method `activities_attributes' for #<Route:0x2bccf08> </code></pre> <p>If i left it like :</p> <pre><code>ruta.activities_attributes << @activitiesarray </code></pre> <p>I get:</p> <pre><code>undefined method `with_indifferent_access' for #<Activity:0x6af7400> </code></pre> <p>Does anyone know ho can I make that possible? Thank you :)</p>

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