Model.new is not saving associations

Course Queries Syllabus Queries 2 years ago

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Posted on 16 Aug 2022, this text provides information on Syllabus Queries related to Course Queries. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.

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manpreet Tuteehub forum best answer Best Answer 2 years ago

 

I have the following models

class Course < ActiveRecord::Base
  has_many :syllabuses, dependent: :destroy
  has_many :topics, through: :syllabuses  
end

class Topic < ActiveRecord::Base
  has_many :syllabuses, dependent: :destroy
  has_many :courses, through: :syllabuses
end

class Syllabus < ActiveRecord::Base
  belongs_to :course
  belongs_to :topic  
end

i am using topic nested in course in the routes

Now while saving a new topic the following code works :-

 @course = Course.find(params[:course_id])    
 @topic = @course.topics.create(topic_params) 

AND this doesnt

@course = Course.find(params[:course_id])    
@topic = @course.topics.new(topic_params)
@topic.save

The new topic is saved but no associations are saved in syllabus , i think i might need to use build function here, can anyone pls help ?

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