ruby on rails - Nested Model Form. Belongs_to class not displaying -


I have a topic model and a text model I have implemented the nested model form.

After creating the topic, I took it to a page where it shows the guessed lesson. However, I failed to see the lessons.

I believe the lesson data is not saved properly when I have given lesson for example. FID_by_accact_id ('1'), I get 'zero' in return.

I am trying to explain how polymorphism works on the railway and if someone tells me where I am getting wrong or guiding me, it has to be made.

topic model 

  attr_accessible: subjectcode,: lessons_attributes is_maya: lessons, dependent => : Delete accepts_nested_attributes_for: lessons ,: reject_if = & gt; Lambda {| One | A [: content] .blank? } ,: Allow_destroy = & gt; Topic   
 text model  
  attr_accessible: lessonName, subject: subject_id related to: topic   
 content controller < / P> > >    theme> Gt; "Theme created successfully." And render: action = & gt; End of 'new' end   
 form  
  & lt;% = form_for @subject do | F | & Gt%; & Lt;% = f.error_messages% & gt; & Lt; P & gt; & Lt;% = f.label: subjectCode% & gt; & Lt; Br / & gt; & Lt;% = f.text_field: subjectCode% & gt; & Lt; / P & gt; & Lt;% = f.fields_for: Lesson | Builder | & Gt%; & Lt; P & gt; & Lt;% = builder.label: Subname% & gt; & Lt; Br / & gt; & Lt;% = builder.text_area: Subtitle, Rows = & gt; 3% & gt; & Lt; / P & gt; & Lt;% end% & gt; & Lt; P & gt; & Lt;% = f.submit "Submit"%> & Lt; / P & gt; & Lt;% end% & gt;   
 Route processing: topics are resources: text end   
 
 
 your  reject_if  lambda will always reject text attributes because the text does not contain the  content  attribute, so you essentially  zero. Blanc?  are evaluating  true    
 
 Maybe you want to see if the name of the text is empty or not? All : reject_f = & gt; Lambda {| One | A [: lessonName] .blank? }

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