Module: DataMapper::Migrations::Sqlite3Adapter

Includes:
SQL
Defined in:
lib/dm-core/migrations.rb

Overview

module PostgresAdapter

Defined Under Namespace

Modules: ClassMethods, SQL

Class Method Summary collapse

Instance Method Summary collapse

Methods included from SQL

#create_table_statement, #property_schema_statement, #query_table, #sqlite_version, #supports_drop_table_if_exists?, #supports_serial?

Class Method Details

.included(base) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

TODO: document



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# File 'lib/dm-core/migrations.rb', line 726

def self.included(base)
  base.extend ClassMethods
end

Instance Method Details

#field_exists?(storage_name, column_name) ⇒ Boolean

TODO: document

Returns:

  • (Boolean) 


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# File 'lib/dm-core/migrations.rb', line 738

def field_exists?(storage_name, column_name)
  query_table(storage_name).any? do |row|
    row.name == column_name
  end
end

#storage_exists?(storage_name) ⇒ Boolean

TODO: document

Returns:

  • (Boolean) 


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# File 'lib/dm-core/migrations.rb', line 732

def storage_exists?(storage_name)
  query_table(storage_name).size > 0
end