Fix model dependencies.

app/models/column_entry.rb

@@ -11,8 +11,8 @@ class ColumnEntry
 
 	mount_uploader :image, ImageUploader
 
-	belongs_to :table_entry, :dependent => :destroy, index: true
-	belongs_to :table_column, :dependent => :destroy, index: true
+	belongs_to :table_entry, index: true
+	belongs_to :table_column, index: true
 
 	I18n.available_locales.each do |locale|
 		index({text: 1}, { collation: {locale: locale.to_s}, unique: false, background: true })

app/models/table_column.rb

@@ -12,7 +12,7 @@ class TableColumn
 	field :make_categorizable, type: Boolean, default: false
 	field :default_ordered_field, type: Boolean, default: false
 	field :order_direction,type: String,default: 'desc'
-	belongs_to :u_table, :dependent => :destroy, index: true
+	belongs_to :u_table, index: true
 
 	has_many :column_entries
 

app/models/table_entry.rb

@@ -7,7 +7,7 @@ class TableEntry
   	field :sort_number, type: Integer
 
 	has_many :column_entries, :dependent => :destroy
-	belongs_to :u_table, :dependent => :destroy, index: true
+	belongs_to :u_table, index: true
 
 	accepts_nested_attributes_for :column_entries, :allow_destroy => true