Class: Babik::Selection::Operation::Regex

Inherits:
Base
  • Object
show all
Defined in:
lib/babik/queryset/lib/selection/operation/regex.rb

Overview

Match by case sensitive regex

Direct Known Subclasses

IRegex

Instance Attribute Summary

Attributes inherited from Base

#field, #sql_operation, #sql_operation_template, #value

Instance Method Summary collapse

Methods inherited from Base

#_init_sql_operation, date_special_cases, #db_engine, escape, factory, initialize_operation, initialize_operators, operator?, special_cases, #to_s

Constructor Details

#initialize(field, value) ⇒ Regex

Returns a new instance of Regex.



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# File 'lib/babik/queryset/lib/selection/operation/regex.rb', line 12

def initialize(field, value)
  value = value.inspect[1..-2] if value.class == Regexp
  value = value[1..-2] if value.class == String && value[0] == '/' && value[-1] == '/'
  value = _mysql2_convert_regex(value) if db_engine == 'mysql2'
  super(field, "?field #{operator} ?value", value)
end

Instance Method Details

#_mysql2_convert_regex(value) ⇒ Object 



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# File 'lib/babik/queryset/lib/selection/operation/regex.rb', line 27

def _mysql2_convert_regex(value)
  replacements = { '\\d' => '[0-9]', '\\w' => '[a-zA-Z]' }
  replacements.each do |pcre_pattern, mysql_pattern|
    value = value.gsub(pcre_pattern, mysql_pattern)
  end
  value
end

#operator ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/babik/queryset/lib/selection/operation/regex.rb', line 19

def operator
  dbms_adapter = db_engine
  return 'REGEXP' if dbms_adapter == 'mysql2'
  return '~' if dbms_adapter == 'postgresql'
  return 'REGEXP' if dbms_adapter == 'sqlite3'
  raise NotImplementedError, "Invalid dbms #{dbms_adapter}. Only mysql, postgresql, and sqlite3 are accepted"
end