Class: ActiveRecord::ConnectionAdapters::AbstractMysqlAdapter::Column

Inherits:
Column
  • Object
show all
Defined in:
activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb

Overview

:nodoc:

Direct Known Subclasses

Mysql2Adapter::Column, MysqlAdapter::Column

Constant Summary

Constants inherited from Column

Column::FALSE_VALUES, Column::TRUE_VALUES

Instance Attribute Summary collapse

Attributes inherited from Column

#coder, #default, #default_function, #limit, #name, #null, #precision, #primary, #scale, #sql_type, #type

Instance Method Summary collapse

Methods inherited from Column

#binary?, binary_to_string, #human_name, #klass, #number?, string_to_dummy_time, string_to_time, #text?, #type_cast, #type_cast_for_write, value_to_boolean, value_to_date, value_to_decimal, value_to_integer

Constructor Details

#initialize(name, default, sql_type = nil, null = true, collation = nil, strict = false, extra = "") ⇒ Column

Returns a new instance of Column.



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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 41

def initialize(name, default, sql_type = nil, null = true, collation = nil, strict = false, extra = "")
  @strict    = strict
  @collation = collation
  @extra     = extra
  super(name, default, sql_type, null)
end

Instance Attribute Details

#collation ⇒ Object (readonly)

Returns the value of attribute collation



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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 39

def collation
  @collation
end

#extra ⇒ Object (readonly)

Returns the value of attribute extra



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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 39

def extra
  @extra
end

#strict ⇒ Object (readonly)

Returns the value of attribute strict



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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 39

def strict
  @strict
end

Instance Method Details

#adapter ⇒ Object

Must return the relevant concrete adapter

Raises:

  • (NotImplementedError) 


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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 72

def adapter
  raise NotImplementedError
end

#blob_or_text_column? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 67

def blob_or_text_column?
  sql_type =~ /blob/i || type == :text
end

#case_sensitive? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 76

def case_sensitive?
  collation && !collation.match(/_ci$/)
end

#extract_default(default) ⇒ Object 



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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 48

def extract_default(default)
  if blob_or_text_column?
    if default.blank?
      null || strict ? nil : ''
    else
      raise ArgumentError, "#{type} columns cannot have a default value: #{default.inspect}"
    end
  elsif missing_default_forged_as_empty_string?(default)
    nil
  else
    super
  end
end

#has_default? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 62

def has_default?
  return false if blob_or_text_column? #mysql forbids defaults on blob and text columns
  super
end