how to access an element from a instance variable

rubyonrails-talk
1

Folks im new to rails and was wondering how i would access these elements from my view

in my controller i have @data = Editpatient.find(:all, :conditions => ["patient_id = ?", params[:patients]] )

and in the view i have <%= @data %>

this displays all the data but i only want one field. This is what is displayed.

[#<Editpatient id: 27, patient_id: 14, provider_id: 11, weight_gained: 123, weight_lost: nil, created_at: "2011-11-26 21:07:13", updated_at: "2011-11-26 21:07:13", patient_name: nil, provider_name: nil>]

the only field i want is patient_id

ive tried this in the view @data[:patient_id] and i get can't convert Symbol into Integer

any help is appreciated thanks

2

@data = Editpatient.find(:all, :conditions => ["patient_id = ?", params[:patients]] )

erm, well. If you expect to get back one record for a given patient_id it could be more readably expressed as:

@editpatient = Editpatient.find_by_patient_id(params[:patient_id])

(assuming you fix your form to pass 'patient_id').

and in the view i have <%= @data %>

Which is opaquely named, and hides the fact that you're fetching an array.

this displays all the data but i only want one field. This is what is displayed.

  @data.first.patient_id

would do it, but I'd strongly recommend cleaning up the code to make your intent more apparent, and only fetch one record, e.g.

  @editpatient.patient_id

HTH,

3

brent brent wrote in post #1033872:

Folks im new to rails and was wondering how i would access these elements from my view

in my controller i have @data = Editpatient.find(:all, :conditions => ["patient_id = ?", params[:patients]] )

and in the view i have <%= @data %>

this displays all the data but i only want one field. This is what is displayed.

[#<Editpatient id: 27, patient_id: 14, provider_id: 11, weight_gained: 123, weight_lost: nil, created_at: "2011-11-26 21:07:13", updated_at: "2011-11-26 21:07:13", patient_name: nil, provider_name: nil>]

the only field i want is patient_id

ive tried this in the view @data[:patient_id] and i get can't convert Symbol into Integer

any help is appreciated thanks

Thanks for the help Hassan This is just a test app that im using to get the hang of ruby and rails. Your method worked perfectly.