Module: RailsSqlViews::ConnectionAdapters::SchemaStatements

Included in:
ActiveRecord::ConnectionAdapters::AbstractAdapter
Defined in:
lib/rails_sql_views/connection_adapters/abstract/schema_statements.rb

Instance Method Summary collapse

Instance Method Details

#create_view(name, select_query, options = {}) ⇒ Object

Create a view. The options hash can include the following keys:

:check_option

Specify restrictions for inserts or updates in updatable views. ANSI SQL 92 defines two check option values: CASCADED and LOCAL. See your database documentation for allowed values.



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# File 'lib/rails_sql_views/connection_adapters/abstract/schema_statements.rb', line 9

def create_view(name, select_query, options={})
  if supports_views?
    view_definition = ViewDefinition.new(self, select_query)

    yield view_definition

    if options[:force]
      drop_view(name) rescue nil
    end

    create_sql = "CREATE VIEW "
    create_sql << "#{name} ("
    create_sql << view_definition.to_sql
    create_sql << ") AS #{view_definition.select_query}"
    create_sql << " WITH #{options[:check_option]} CHECK OPTION" if options[:check_option]
    execute create_sql
  end
end

#drop_view(name, options = {}) ⇒ Object

Drop a view. The options hash can include the following keys:

:drop_behavior

Specify the drop behavior. ANSI SQL 92 defines two drop behaviors, CASCADE and RESTRICT. See your database documentation to determine what drop behaviors are available.



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# File 'lib/rails_sql_views/connection_adapters/abstract/schema_statements.rb', line 33

def drop_view(name, options={})
  if supports_views?
    drop_sql = "DROP VIEW #{name}"
    drop_sql << " #{options[:drop_behavior]}" if options[:drop_behavior]
    execute drop_sql
  end
end