Store data from one table to another in rails

Question

I have a fundings table and organisations table. Fundings table has organisation_id. In fundings table I have fields that are same with organisations table. What I want is when application is created and on funding show page there is a add button to add all fields that are same in fundings and organisations table gets stored in organisations table as well. Please help

_form.html.erb (funding_form)

<%= form_for([@parent, @child, @funding], :html => {class: "form-horizontal",role: "form"}) do |form| %>
      <div class = "form-group">
        <div class="control-label col-sm-2">
          <%= form.label :activity_details, class: "required" %>
        </div>
        <div class="col-sm-8">
          <%= form.text_area :activity_details, required: true %>
        </div>
      </div>

<!--Adding organisation -->
      <div class = "form-group">
        <div class="control-label col-sm-2">
          <%= form.label :name_of_organisation, id: "name_of_organisation-label" %>
        </div>
      <div class="col-sm-8">
        <%= form.text_field :name_of_organisation, class: "form-control hidden", id: "name_of_organisation-textfield" %>
      </div>
    </div>

    <div class = "form-group">
        <div class="control-label col-sm-2">
          <%= form.label :address, id: "address-label" %>
        </div>
      <div class="col-sm-8">
        <%= form.text_field :address, class: "form-control hidden", id: "address-textfield" %>
      </div>
    </div>
    <div class = "form-group">
        <div class="control-label col-sm-2">
          <%= form.label :city, id: "city-label" %>
        </div>
      <div class="col-sm-8">
        <%= form.text_field :city, class: "form-control hidden", id: "city-textfield" %>
      </div>
    </div>
    <div class = "form-group">
        <div class="control-label col-sm-2">
          <%= form.label :province, id: "province-label" %>
        </div>
      <div class="col-sm-8">
        <%= form.text_field :province, class: "form-control hidden", id: "province-textfield" %>
      </div>
    </div>


<!-- End Adding organisation -->        


      <div class="form-group">
        <div class="col-sm-10">
          <%= form.submit "Apply", class: 'btn btn-primary btn-lg' %>
        </div>
      </div>
    </div>
  </div>
<% end %>

show.html.erb(funding show page)

<p>
  <strong>Name of Organisation:</strong>
<%= @funding.name_of_organisation %></p><br>
<p>
  <strong>Address:</strong>
<%= @funding.address %></p><br>
<p>
  <strong>City:</strong>
<%= @funding.city %></p><br>
<p>
  <strong>Province:</strong>
<%= @funding.province %></p><br>
<p>

<% if current_user.admin? %>
        <%= link_to 'Add Organisation', "" %>
<% end %>

if admin clicks on add organisation fields get added to organisation table.

schema funding table

t.text "activity_details"
t.string "city"
t.string "name_of_organisation"
t.string "province"
t.text "address"

schema organisations table

t.string "name_of_organisation"
t.text "address"
t.string "city"
t.string "province"

funding.rb

belongs_to :organisation

organisation.rb

has_many :fundings

organisations controller I have a new and create method to create organisation by the admin directly.so i have added a new_org method to get add the organisation from the funding table. But I am not able to find out how to implement it.

def new_org
    @organisation = Organisation.new
end

def create_org
    @organisation = Organisation.new(organisation_params)
    if @organisation.save
        flash[:success] = "Organisation is added"
        redirect_to main_admin_service_provider_path
    else 
        render 'new'
    end
end

Answer 1

Something like this should work:

app/controllers/fundings_controller.rb

class FundingsController < ApplicationController

  before_action :set_funding, on: %i[show add_organisation]

  # ...

  def update_organisation
    return head :forbidden unless current_user.admin?

    # assuming funding always has an organisation
    whitelist = %w[your field names]
    @funding.organisation.update!(@funding.attributes.slice(*whitelist))
    redirect_to @funding, notice: 'fields successfully added to organisation'
  end

  # ...

  private

  def set_funding
    @funding = Funding.find(params[:id])
  end

end

config/routes.rb

Rails.application.routes.draw do

  # ...

  resources :fundings, only: :show do

    # using patch because we are updating an existing resource
    # but you can change this to whatever you like
    patch 'update_organisation', on: :member

  end

  # ...

end

app/views/fundings/show.html.erb

<% if current_user.admin? %>
   <%= link_to 'Add Organisation', update_organisation_funding_path(@funding), method: :patch %>
<% end %>

---

Alternatively you can update all double fields (without whitelisting) using the following code:

double_attribute_names = @funding.attribute_names & @funding.organisation.attribute_names
@funding.organisation.update!(@funding.attributes.slice(*double_attribute_names)

However keep in mind that this may produce unwanted results. For example some fields you don't want to update like 'id' , 'created_at' , 'updated_at' are most likely present on both instances, and maybe some custom double fields.

This can be resolved by creating a blacklist to exclude those fields:

blacklist = %w[id created_at updated_at]
double_attribute_names = @funding.attribute_names & @funding.organisation.attribute_names
@funding.organisation.update!(@funding.attributes.slice(*double_attribute_names).except(*blacklist))

But generally speaking it's better to whitelist.

Answer 2

This is not a good way to do it but you can define a hidden form with hidden fields with values of @funding.x on show page by defining @organization = Organization.new in show method on Fundings.controller then you can simply post it as normal form. Or you can show this form to only admins.