X-Git-Url: https://git.decadent.org.uk/gitweb/?a=blobdiff_plain;f=daklib%2Fdbconn.py;h=1ac0c4b5de02992a83819ef8e02999369582d701;hb=227db2f1b21c06ec076c88f79850daf0f154b900;hp=aa71c180073f1986b764ffb9bf450158e1213dfe;hpb=71565adc68c3eddfd5459a56a4259451bffb0ee8;p=dak.git diff --git a/daklib/dbconn.py b/daklib/dbconn.py index aa71c180..1ac0c4b5 100755 --- a/daklib/dbconn.py +++ b/daklib/dbconn.py @@ -53,9 +53,10 @@ from tempfile import mkstemp, mkdtemp from inspect import getargspec import sqlalchemy -from sqlalchemy import create_engine, Table, MetaData, Column, Integer, desc +from sqlalchemy import create_engine, Table, MetaData, Column, Integer, desc, \ + Text, ForeignKey from sqlalchemy.orm import sessionmaker, mapper, relation, object_session, \ - backref, MapperExtension, EXT_CONTINUE + backref, MapperExtension, EXT_CONTINUE, object_mapper from sqlalchemy import types as sqltypes # Don't remove this, we re-export the exceptions to scripts which import us @@ -287,6 +288,50 @@ class ORMObject(object): ''' return session.query(cls).get(primary_key) + def session(self, replace = False): + ''' + Returns the current session that is associated with the object. May + return None is object is in detached state. + ''' + + return object_session(self) + + def clone(self, session = None): + ''' + Clones the current object in a new session and returns the new clone. A + fresh session is created if the optional session parameter is not + provided. The function will fail if a session is provided and has + unflushed changes. + + RATIONALE: SQLAlchemy's session is not thread safe. This method clones + an existing object to allow several threads to work with their own + instances of an ORMObject. + + WARNING: Only persistent (committed) objects can be cloned. Changes + made to the original object that are not committed yet will get lost. + The session of the new object will always be rolled back to avoid + ressource leaks. + ''' + + if self.session() is None: + raise RuntimeError( \ + 'Method clone() failed for detached object:\n%s' % self) + self.session().flush() + mapper = object_mapper(self) + primary_key = mapper.primary_key_from_instance(self) + object_class = self.__class__ + if session is None: + session = DBConn().session() + elif len(session.new) + len(session.dirty) + len(session.deleted) > 0: + raise RuntimeError( \ + 'Method clone() failed due to unflushed changes in session.') + new_object = session.query(object_class).get(primary_key) + session.rollback() + if new_object is None: + raise RuntimeError( \ + 'Method clone() failed for non-persistent object:\n%s' % self) + return new_object + __all__.append('ORMObject') ################################################################################ @@ -421,12 +466,13 @@ __all__.append('get_archive') ################################################################################ -class BinContents(object): - def __init__(self, *args, **kwargs): - pass +class BinContents(ORMObject): + def __init__(self, file = None, binary = None): + self.file = file + self.binary = binary - def __repr__(self): - return '' % (self.binary, self.filename) + def properties(self): + return ['file', 'binary'] __all__.append('BinContents') @@ -447,7 +493,7 @@ class DBBinary(ORMObject): def properties(self): return ['package', 'version', 'maintainer', 'source', 'architecture', \ 'poolfile', 'binarytype', 'fingerprint', 'install_date', \ - 'suites_count', 'binary_id'] + 'suites_count', 'binary_id', 'contents_count'] def not_null_constraints(self): return ['package', 'version', 'maintainer', 'source', 'poolfile', \ @@ -865,8 +911,8 @@ class Component(ORMObject): return NotImplemented def properties(self): - return ['component_name', 'component_id', 'description', 'location', \ - 'meets_dfsg'] + return ['component_name', 'component_id', 'description', \ + 'location_count', 'meets_dfsg', 'overrides_count'] def not_null_constraints(self): return ['component_name'] @@ -1827,12 +1873,15 @@ __all__.append('get_override') ################################################################################ -class OverrideType(object): - def __init__(self, *args, **kwargs): - pass +class OverrideType(ORMObject): + def __init__(self, overridetype = None): + self.overridetype = overridetype - def __repr__(self): - return '' % self.overridetype + def properties(self): + return ['overridetype', 'overridetype_id', 'overrides_count'] + + def not_null_constraints(self): + return ['overridetype'] __all__.append('OverrideType') @@ -2029,9 +2078,16 @@ __all__.append('get_policy_queue_from_path') ################################################################################ -class Priority(object): - def __init__(self, *args, **kwargs): - pass +class Priority(ORMObject): + def __init__(self, priority = None, level = None): + self.priority = priority + self.level = level + + def properties(self): + return ['priority', 'priority_id', 'level', 'overrides_count'] + + def not_null_constraints(self): + return ['priority', 'level'] def __eq__(self, val): if isinstance(val, str): @@ -2045,9 +2101,6 @@ class Priority(object): # This signals to use the normal comparison operator return NotImplemented - def __repr__(self): - return '' % (self.priority, self.priority_id) - __all__.append('Priority') @session_wrapper @@ -2099,9 +2152,15 @@ __all__.append('get_priorities') ################################################################################ -class Section(object): - def __init__(self, *args, **kwargs): - pass +class Section(ORMObject): + def __init__(self, section = None): + self.section = section + + def properties(self): + return ['section', 'section_id', 'overrides_count'] + + def not_null_constraints(self): + return ['section'] def __eq__(self, val): if isinstance(val, str): @@ -2115,9 +2174,6 @@ class Section(object): # This signals to use the normal comparison operator return NotImplemented - def __repr__(self): - return '
' % self.section - __all__.append('Section') @session_wrapper @@ -2830,7 +2886,9 @@ class DBConn(object): 'binary_acl', 'binary_acl_map', 'build_queue', + 'build_queue_files', 'changelogs_text', + 'changes', 'component', 'config', 'changes_pending_binaries', @@ -2857,15 +2915,9 @@ class DBConn(object): 'suite', 'uid', 'upload_blocks', - # The following tables have primary keys but sqlalchemy - # version 0.5 fails to reflect them correctly with database - # versions before upgrade #41. - #'changes', - #'build_queue_files', ) tables_no_primary = ( - 'bin_contents', 'changes_pending_files_map', 'changes_pending_source_files', 'changes_pool_files', @@ -2875,9 +2927,6 @@ class DBConn(object): 'suite_src_formats', 'suite_build_queue_copy', 'udeb_contents', - # see the comment above - 'changes', - 'build_queue_files', ) views = ( @@ -2917,6 +2966,14 @@ class DBConn(object): table = Table(table_name, self.db_meta, autoload=True) setattr(self, 'tbl_%s' % table_name, table) + # bin_contents needs special attention until update #41 has been + # applied + self.tbl_bin_contents = Table('bin_contents', self.db_meta, \ + Column('file', Text, primary_key = True), + Column('binary_id', Integer, ForeignKey('binaries.id'), \ + primary_key = True), + autoload=True, useexisting=True) + for view_name in views: view = Table(view_name, self.db_meta, autoload=True) setattr(self, 'view_%s' % view_name, view) @@ -3087,8 +3144,7 @@ class DBConn(object): mapper(Location, self.tbl_location, properties = dict(location_id = self.tbl_location.c.id, component_id = self.tbl_location.c.component, - component = relation(Component, \ - backref=backref('location', uselist = False)), + component = relation(Component, backref='location'), archive_id = self.tbl_location.c.archive, archive = relation(Archive), # FIXME: the 'type' column is old cruft and @@ -3112,13 +3168,17 @@ class DBConn(object): suite = relation(Suite), package = self.tbl_override.c.package, component_id = self.tbl_override.c.component, - component = relation(Component), + component = relation(Component, \ + backref=backref('overrides', lazy='dynamic')), priority_id = self.tbl_override.c.priority, - priority = relation(Priority), + priority = relation(Priority, \ + backref=backref('overrides', lazy='dynamic')), section_id = self.tbl_override.c.section, - section = relation(Section), + section = relation(Section, \ + backref=backref('overrides', lazy='dynamic')), overridetype_id = self.tbl_override.c.type, - overridetype = relation(OverrideType))) + overridetype = relation(OverrideType, \ + backref=backref('overrides', lazy='dynamic')))) mapper(OverrideType, self.tbl_override_type, properties = dict(overridetype = self.tbl_override_type.c.type, @@ -3189,6 +3249,12 @@ class DBConn(object): fingerprint = relation(Fingerprint, backref="uploadblocks"), uid = relation(Uid, backref="uploadblocks"))) + mapper(BinContents, self.tbl_bin_contents, + properties = dict( + binary = relation(DBBinary, + backref=backref('contents', lazy='dynamic')), + file = self.tbl_bin_contents.c.file)) + ## Connection functions def __createconn(self): from config import Config