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

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

Overview

:nodoc:

Constant Summary

Constants inherited from Column

Column::FALSE_VALUES, Column::TRUE_VALUES

Instance Attribute Summary collapse

Attributes inherited from Column

#cast_type, #default, #default_function, #name, #null, #sql_type

Instance Method Summary collapse

Methods inherited from Column

#hash, #human_name, #with_type

Constructor Details

#initialize(name, default, cast_type, 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 70

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

Instance Attribute Details

#collationObject (readonly)

Returns the value of attribute collation


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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 68

def collation
  @collation
end

#extraObject (readonly)

Returns the value of attribute extra


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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 68

def extra
  @extra
end

#strictObject (readonly)

Returns the value of attribute strict


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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 68

def strict
  @strict
end

Instance Method Details

#==(other) ⇒ Object


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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 100

def ==(other)
  super &&
    collation == other.collation &&
    strict == other.strict &&
    extra == other.extra
end

#blob_or_text_column?Boolean

Returns:

  • (Boolean)

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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 92

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 96

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

#extract_defaultObject


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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 79

def extract_default
  if blob_or_text_column?
    @default = null || strict ? nil : ''
  elsif missing_default_forged_as_empty_string?(@default)
    @default = nil
  end
end

#has_default?Boolean

Returns:

  • (Boolean)

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# File 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb', line 87

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