How to add queries between tables in Ruby on Rails - ruby-on-rails

Question

I'm trying to design a complicated form. Fields also need to add data that I received with queries to other tables.
Here's what I'm trying to do.
Rad_check form is composed of username and password... When the user registers by typing username and password, the Rad_cheks table must consist of other records in the back. I was able to do some of the Radcheck model. However, I want to conditionally query the tenant_id column in the Nas table and insert it into the Rad_checks table. I've actually prepared a query for that, but I don't know how to use it.
Na.select(:tenant_id).where(Na.arel_table[:realipaddr].eq('form's real ip will be'))
Actually, I'm using the Milia gem file. However, there will be a somewhat more public form... the query I created must come in a way instead of the IP address of the request. REMOTE_IP code. This means that the user's actual IP address is tenant_id information that is equal to the IP address in the NAS table.
When saving the Rad_chek form, I want to query the user's actual IP address in the Nas table and add the tenant_id number of the equal data to the Rad_cheks table. How can I do that?
Help me! Please
TABLE
class CreateRadChecks < ActiveRecord::Migration[5.2]
def change
create_table :rad_checks do |t|
t.integer :tenant_id
t.string :username
t.string :password
t.string :attribu
t.string :op
t.timestamps
end
end
end
FORM
<%= form_with(model: rad_check, local: true) do |form| %>
<% if rad_check.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(rad_check.errors.count, "error") %> prohibited this rad_check from being saved:</h2>
<ul>
<% rad_check.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= form.label :username %>
<%= form.text_field :username %>
</div>
<div class="field">
<%= form.label :password %>
<%= form.text_field :password %>
</div>
<div class="actions">
<%= form.submit %>
</div>
<% end %>
MODEL
class RadCheck < ApplicationRecord
has_one :rad_user_group, dependent: :destroy
after_initialize :add_rad_user_group
before_save :set_radcheck
def add_rad_user_group
self.rad_user_group ||= RadUserGroup.new if self.new_record?
end
def set_radcheck
self.rad_user_group.username = username
self.op = ":="
self.attribu = "Cleartext-Password"
end
end
rad_user_group table
class CreateRadUserGroups < ActiveRecord::Migration[5.2]
def change
create_table :rad_user_groups do |t|
t.integer :tenant_id
t.string :username
t.string :groupname
t.references :rad_check, foreign_key: true
t.timestamps
end
end
end
nas table
class CreateNas < ActiveRecord::Migration[5.2]
def change
create_table :nas do |t|
t.integer :tenant_id
t.string :nasname
t.string :realipaddr
t.boolean :active
end
end
end

Answer 1

Assuming:
You have a variable called realipaddr
Nas belongs_to :tenant
RadCheck belongs_to :tenant
you have instantiated a variable called #rad_check
Then you should be able to do something like:
#rad_check.update(tenant: Nas.find_by(realipaddr: realipaddr).tenant)
Or, if you don't want the save that occurs with update:
#rad_check.tenant = Nas.find_by(realipaddr: realipaddr).tenant
If you're instantiating #rad_check based on rad_check_params in a controller, you might do something like:
def create
#rad_check = RadCheck.new(rad_check_params)
if #rad_check.save
# do something
else
# do something else
end
end
def rad_check_params
params.require(:rad_check).permit(:some, :parameters).merge!(tenant: nas_tenant))
end
def nas_tenant
Nas.find_by(realipaddr: realipaddr).tenant
end
There are probably other ways, too.

Answer 2

That's how it worked. I really appreciate the information you gave me. Only the variable request.remote_ip returns the local IP address. The ISP does not give the IP address. How do I make this?
def realipaddr
request.remote_addr
end
# POST /rad_checks
# POST /rad_checks.json
def create
#rad_check = RadCheck.new(rad_check_params)
#rad_check.tenant_id = Na.find_by(realipaddr: realipaddr).tenant_id
respond_to do |format|
if #rad_check.save
format.html { redirect_to #rad_check, notice: 'Rad check was successfully created.' }
format.json { render :show, status: :created, location: #rad_check }
else
format.html { render :new }
format.json { render json: #rad_check.errors, status: :unprocessable_entity }
end
end
end