Module: DataMapper::Migrations::SqliteAdapter::SQL

Included in:
DataMapper::Migrations::SqliteAdapter
Defined in:
lib/dm-migrations/adapters/dm-sqlite-adapter.rb

Overview

:nodoc:

Instance Method Summary collapse

Instance Method Details

#create_table_statement(connection, model, properties) ⇒ 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. 



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# File 'lib/dm-migrations/adapters/dm-sqlite-adapter.rb', line 47

def create_table_statement(connection, model, properties)
  statement = DataMapper::Ext::String.compress_lines(<<-SQL)
    CREATE TABLE #{quote_name(model.storage_name(name))}
    (#{properties.map { |property| property_schema_statement(connection, property_schema_hash(property)) }.join(', ')}
  SQL

  # skip adding the primary key if one of the columns is serial.  In
  # SQLite the serial column must be the primary key, so it has already
  # been defined
  unless properties.any? { |property| property.serial? }
    statement << ", PRIMARY KEY(#{properties.key.map { |property| quote_name(property.field) }.join(', ')})"
  end

  statement << ')'
  statement
end

#property_schema_statement(connection, schema) ⇒ 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. 



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# File 'lib/dm-migrations/adapters/dm-sqlite-adapter.rb', line 65

def property_schema_statement(connection, schema)
  statement = super

  if supports_serial? && schema[:serial]
    statement << ' PRIMARY KEY AUTOINCREMENT'
  end

  statement
end

#sqlite_version ⇒ 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. 



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# File 'lib/dm-migrations/adapters/dm-sqlite-adapter.rb', line 76

def sqlite_version
  @sqlite_version ||= select('SELECT sqlite_version(*)').first.freeze
end

#supports_drop_table_if_exists? ⇒ Boolean

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.

Returns:

  • (Boolean) 


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# File 'lib/dm-migrations/adapters/dm-sqlite-adapter.rb', line 37

def supports_drop_table_if_exists?
  @supports_drop_table_if_exists ||= sqlite_version >= '3.3.0'
end

#supports_serial? ⇒ Boolean

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.

Returns:

  • (Boolean) 


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# File 'lib/dm-migrations/adapters/dm-sqlite-adapter.rb', line 32

def supports_serial?
  @supports_serial ||= sqlite_version >= '3.1.0'
end

#table_info(table_name) ⇒ 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. 



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# File 'lib/dm-migrations/adapters/dm-sqlite-adapter.rb', line 42

def table_info(table_name)
  select("PRAGMA table_info(#{quote_name(table_name)})")
end