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Versions: 13
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Contents
module Sequel
class Model
# Defines a table schema (see Schema::Generator for more information).
#
# This is only needed if you want to use the create_table or drop_table
# methods.
def self.set_schema(name = nil, &block)
if name
set_dataset(db[name])
end
@schema = Schema::Generator.new(db, &block)
if @schema.primary_key_name
set_primary_key @schema.primary_key_name
end
end
# Returns table schema for direct descendant of Model.
def self.schema
@schema || ((superclass != Model) && (superclass.schema))
end
# Returns name of table.
def self.table_name
dataset.opts[:from].first
end
# Returns true if table exists, false otherwise.
def self.table_exists?
db.table_exists?(table_name)
end
# Creates table.
def self.create_table
db.create_table_sql_list(table_name, *schema.create_info).each {|s| db << s}
end
# Drops table.
def self.drop_table
db.execute db.drop_table_sql(table_name)
end
# Like create_table but invokes drop_table when table_exists? is true.
def self.create_table!
drop_table if table_exists?
create_table
end
end
end
Version data entries
13 entries across 13 versions & 2 rubygems