Revert "Grid model object updates"

This reverts commit 70e820b781.

app/models/grid_character.rb

@@ -1,8 +1,6 @@
 # frozen_string_literal: true
 
 class GridCharacter < ApplicationRecord
-  has_one :object, class_name: 'Character', foreign_key: :id, primary_key: :character_id
-
   belongs_to :awakening, optional: true
   belongs_to :party,
              counter_cache: :characters_count,
@@ -89,9 +87,9 @@ class GridCharacter < ApplicationRecord
   private
 
   def add_awakening
-    return unless awakening.nil?
-
-    self.awakening = Awakening.where(slug: 'character-balanced').sole
+    if self.awakening.nil?
+      self.awakening = Awakening.where(slug: "character-balanced").sole
+    end
   end
 
   def check_value(property, type)

app/models/grid_summon.rb

@@ -5,7 +5,6 @@ class GridSummon < ApplicationRecord
              counter_cache: :summons_count,
              inverse_of: :summons
   validates_presence_of :party
-  has_one :object, class_name: 'Summon', foreign_key: :id, primary_key: :summon_id
 
   validate :compatible_with_position, on: :create
   validate :no_conflicts, on: :create
@@ -24,7 +23,6 @@ class GridSummon < ApplicationRecord
 
     party.summons.find do |grid_summon|
       return unless grid_summon.id
-
       grid_summon if summon.id == grid_summon.summon.id
     end
   end

app/models/grid_weapon.rb

@@ -6,8 +6,6 @@ class GridWeapon < ApplicationRecord
              inverse_of: :weapons
   validates_presence_of :party
 
-  has_one :object, class_name: 'Weapon', foreign_key: :id, primary_key: :weapon_id
-
   belongs_to :weapon_key1, class_name: 'WeaponKey', foreign_key: :weapon_key1_id, optional: true
   belongs_to :weapon_key2, class_name: 'WeaponKey', foreign_key: :weapon_key2_id, optional: true
   belongs_to :weapon_key3, class_name: 'WeaponKey', foreign_key: :weapon_key3_id, optional: true
@@ -80,6 +78,10 @@ class GridWeapon < ApplicationRecord
 
   # Checks if the weapon should be a mainhand before saving the model
   def is_mainhand
-    self.mainhand = position == -1
+    if self.position == -1
+      self.mainhand = true
+    else
+      self.mainhand = false
+    end
   end
 end