Method: Sequel::Model::ClassMethods#set_dataset

Defined in:
lib/sequel/model/base.rb

#set_dataset(ds, opts = {}) ⇒ Object Also known as: dataset=

Sets the dataset associated with the Model class. ds can be a Symbol (specifying a table name in the current database), or a Dataset. If a dataset is used, the model’s database is changed to the given dataset. If a symbol is used, a dataset is created from the current database with the table name given. Other arguments raise an Error. Returns self.

This changes the row_proc of the given dataset to return model objects, extends the dataset with the dataset_method_modules, and defines methods on the dataset using the dataset_methods. It also attempts to determine the database schema for the model, based on the given dataset.



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# File 'lib/sequel/model/base.rb', line 271

def set_dataset(ds, opts={})
  inherited = opts[:inherited]
  @dataset = case ds
  when Symbol
    @simple_table = db.literal(ds)
    db[ds]
  when Dataset
    @simple_table = nil
    @db = ds.db
    ds
  else
    raise(Error, "Model.set_dataset takes a Symbol or a Sequel::Dataset")
  end
  @dataset.row_proc = Proc.new{|r| load(r)}
  if inherited
    @simple_table = superclass.simple_table
    @columns = @dataset.columns rescue nil
  else
    @dataset_method_modules.each{|m| @dataset.extend(m)} if @dataset_method_modules
    @dataset_methods.each{|meth, block| @dataset.meta_def(meth, &block)} if @dataset_methods
  end
  @dataset.model = self if @dataset.respond_to?(:model=)
  begin
    @db_schema = (inherited ? superclass.db_schema : get_db_schema)
  rescue Sequel::DatabaseConnectionError
    raise
  rescue
    nil
  end
  self
end