Class: ClientSideValidations::ActiveRecord::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/client_side_validations/active_record/middleware.rb

Class Method Summary collapse

Class Method Details

.is_class?(klass) ⇒ Boolean

Returns:

  • (Boolean) 


4
5
6
 
# File 'lib/client_side_validations/active_record/middleware.rb', line 4

def self.is_class?(klass)
  klass.abstract_class.blank? && klass < ::ActiveRecord::Base
end

.is_unique?(klass, attribute, value, params) ⇒ Boolean

Returns:

  • (Boolean) 


8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
 
# File 'lib/client_side_validations/active_record/middleware.rb', line 8

def self.is_unique?(klass, attribute, value, params)
  klass = find_topmost_superclass(klass)
  value = type_cast_value(klass, attribute, value)
  column = klass.columns_hash[attribute.to_s]
  value = column.limit ? value.to_s.mb_chars[0, column.limit] : value.to_s if column.text?

  t = klass.arel_table

  sql = []
  if params[:case_sensitive] == 'true'
    sql << 'BINARY' if t.engine.connection.adapter_name =~ /^mysql/i
    sql << t[attribute].eq(value).to_sql
  else
    escaped_value = value.gsub(/[%_]/, '\\\\\0')
    sql << "#{t[attribute].matches(escaped_value).to_sql} ESCAPE '\\'"
  end

  sql << "AND #{t[klass.primary_key].not_eq(params[:id]).to_sql}" if params[:id]

  (params[:scope] || {}).each do |attribute, value|
    value = type_cast_value(klass, attribute, value)
    sql << "AND #{t[attribute].eq(value).to_sql}"
  end

  relation = Arel::Nodes::SqlLiteral.new(sql.join(' '))
  !klass.where(relation).exists?
end