How do i add new records in array and update records from an array in the data base Rails API

Question

This is the data i am receiving and would want to add new records if the id is not present in the array and also update the records if there is no id in the array

my Models: class Course < ApplicationRecord has_many: topics belongs_to :user end

class Topic < ApplicationRecord belongs_to :course belongs_to :user end

class User < ApplicationRecord has_many :courses has_many :Topics end

This is the array am receiving from Rails API via PostMan [ { "title" : "Topic Name", "path_url" : "https://resource-asws-path-url" }, { "id" : 2311, "title" : "Topic Name", "path_url" : "https://resource-asws-path-url" } ]

this is how am doing it:

 if params[:topics].present?
                    attributes_list = [params[:topics]].to_s
                    attributes_list.each do |attributes|
                      if attributes.key?('id')
                        Topic.find(attributes['id']).update!(attributes)
                      else
                        Topic.create!(attributes)
                      end
                    end
I need to get attributes dynamically from the request from post under params[topics]

Please share how exactly you use Postman to send that data to your application and how exactly the log file entry for that request looks like. — spickermann
– spickermann, Commented Mar 10, 2022 at 11:41
Guys have been able to solve the issue: if params[:topics].present? @param=[params[:topics]] @json=JSON.parse("#{@param[0]}") p @json[0] @p= @json.each do |topic| if topic.key?('id').present? @w= Topic.find(topic['id']).update(topic) else @regex= @course.topics.create!(topic) end end end end — Asher Namanya
– Asher Namanya, Commented Mar 10, 2022 at 14:46

spickermann · Accepted Answer · 2022-03-10 15:12:05Z

0

I would do that with a condition:

if params[:topics].present?
  JSON.parse(params[:topics]).each do |topic|
    if topis.key?('id')
      Topic.find(topic['id']).update!(topic)
    else
      Topic.create!(topic)
    end
  end
end

edited Mar 10, 2022 at 15:12

answered Mar 10, 2022 at 9:18

spickermann

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13 Comments

Asher Namanya Over a year ago

Thanks the array is generated from the api, can you please post an image

Asher Namanya Over a year ago

how do i get the attributes from the API request? Dynamically and pick them from attributes_list

Asher Namanya Over a year ago

Hey @spickermann, thanks for answering my question, However i have edited the question, i want to add these records from Rails API to the database, How do i get those attributes sent in the request from the API via Postman?

Asher Namanya Over a year ago

I am running into this error each time i try to run the above code: NoMethodError (undefined method `key?' for "[{\"name\"":String):

Asher Namanya Over a year ago

NoMethodError (undefined method `key?' for "[\"330087\"]":String):

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