allow saving of subproject when using existing client

app/models/subproject.rb

@@ -5,9 +5,9 @@ class Subproject < ApplicationRecord
   belongs_to :owner, class_name: 'Client', optional: true
   belongs_to :builder, class_name: 'Client', optional: true
 
-  accepts_nested_attributes_for :client, reject_if: :all_blank
-  accepts_nested_attributes_for :owner, reject_if: :all_blank
-  accepts_nested_attributes_for :builder, reject_if: :all_blank
+  accepts_nested_attributes_for :client, reject_if: ->(attrs) { attrs['id'].present? || attrs.values.all?(&:blank?) }
+  accepts_nested_attributes_for :owner,  reject_if: ->(attrs) { attrs['id'].present? || attrs.values.all?(&:blank?) }
+  accepts_nested_attributes_for :builder, reject_if: ->(attrs) { attrs['id'].present? || attrs.values.all?(&:blank?) }
 
   validates :subproject_name, presence: true
   validate :client_presence_check
@@ -17,16 +17,19 @@ class Subproject < ApplicationRecord
   validates_associated :client, :owner, :builder
 
   def client_attributes=(attributes)
+    return if self.client_id.present?
     self.client = Client.find_or_initialize_by(email: attributes[:email])
     self.client.assign_attributes(attributes)
   end
 
   def owner_attributes=(attributes)
+    return if self.owner_id.present?
     self.owner = Client.find_or_initialize_by(email: attributes[:email])
     self.owner.assign_attributes(attributes)
   end
 
   def builder_attributes=(attributes)
+    return if self.builder_id.present?
     self.builder = Client.find_or_initialize_by(email: attributes[:email])
     self.builder.assign_attributes(attributes)
   end
@@ -57,12 +60,12 @@ class Subproject < ApplicationRecord
   end
 
   def owner_attributes_blank?
-    return true if client.nil?
+    return true if owner.nil?
     owner.attributes.except("id", "created_at", "updated_at").values.all?(&:blank?)
   end
 
   def builder_attributes_blank?
-    return true if client.nil?
+    return true if builder.nil?
     builder.attributes.except("id", "created_at", "updated_at").values.all?(&:blank?)
   end