diff --git a/legacy/migration.py b/legacy/migration.py index 5e8cf3ed6..06e4d69c2 100644 --- a/legacy/migration.py +++ b/legacy/migration.py @@ -26,7 +26,8 @@ appconfs = [apps.get_app_config(n) for n in [ 'protocoloadm', ]] stubs_list = [] - +unique_constraints = [] +stub_created = False name_sets = [set(m.__name__ for m in ac.get_models()) for ac in appconfs] # apps do not overlap @@ -91,6 +92,12 @@ def warn(msg): def get_fk_related(field, value, label=None): + has_textfield = False + fields_dict = {} + global stub_created + + if value is None and field.null is False: + value = 0 if value is not None: try: value = field.related_model.objects.get(id=value) @@ -100,9 +107,32 @@ def get_fk_related(field, value, label=None): field.name, value, field.model.__name__, label or '---') if value == 0: - # we interpret FK == 0 as actually FK == NONE - value = None - warn(msg + ' => using NONE for zero value') + # se FK == 0, criamos um stub e colocamos o valor DESCONHECIDO + # para qualquer TextField que possa haver + all_fields = field.related_model._meta.get_fields() + for related_field in all_fields: + if related_field.get_internal_type() == 'TextField': + fields_dict[related_field.name] = 'DESCONHECIDO' + has_textfield = True + elif related_field.get_internal_type() == 'CharField': + fields_dict[related_field.name] = 'D' + has_textfield = True + if has_textfield and field.null is False: + if not stub_created: + stub_created = mommy.make(field.related_model, + **fields_dict) + warn(msg + ' => STUB CREATED FOR NOT NULL FIELD') + value = stub_created + else: + value = stub_created + warn(msg + ' => USING STUB ALREADY CREATED') + elif not has_textfield and field.null is False: + stub_created = mommy.make(field.related_model) + warn(msg + ' => STUB CREATED WITH RANDOM VALUES') + value = stub_created + else: + value = None + warn(msg + ' => using NONE for zero value') else: value = make_stub(field.related_model, value) stubs_list.append((value.id, field)) @@ -133,6 +163,39 @@ def iter_sql_records(sql, db): yield record +def delete_constraints(model): + global unique_constraints + # pega nome da unique constraint dado o nome da tabela + table = model._meta.db_table + cursor = exec_sql("SELECT conname FROM pg_constraint WHERE conrelid = " + "(SELECT oid FROM pg_class WHERE relname LIKE " + "'%s') and contype = 'u';" % (table)) + result = cursor.fetchone() + # if theres a result then delete + if result: + args = model._meta.unique_together[0] + args_list = list(args) + + unique_constraints.append([table, result[0], args_list, model]) + exec_sql("ALTER TABLE %s DROP CONSTRAINT %s;" % + (table, result[0])) + + +def recreate_constraints(): + global unique_constraints + if unique_constraints: + for constraint in unique_constraints: + table, name, args, model = constraint + for i in range(len(args)): + if isinstance(model._meta.get_field(args[i]), + models.ForeignKey): + args[i] = args[i]+'_id' + args_string = '' + args_string += "(" + ', '.join(map(str, args)) + ")" + exec_sql("ALTER TABLE %s ADD CONSTRAINT %s UNIQUE %s;" % + (table, name, args_string)) + + def save_with_id(new, id): sequence_name = '%s_id_seq' % type(new)._meta.db_table cursor = exec_sql('SELECT last_value from %s;' % sequence_name) @@ -153,7 +216,6 @@ def make_stub(model, id): class DataMigrator: - def __init__(self): self.field_renames, self.model_renames = get_renames() @@ -163,7 +225,8 @@ class DataMigrator: for field in new._meta.fields: old_field_name = renames.get(field.name) field_type = field.get_internal_type() - + msg = ("Field %s (%s) from model %s " % + (field.name, field_type, field.model.__name__)) if old_field_name: old_value = getattr(old, old_field_name) if isinstance(field, models.ForeignKey): @@ -176,13 +239,23 @@ class DataMigrator: value = get_fk_related(field, old_value, label) else: value = getattr(old, old_field_name) + if (field_type == 'DateField' and + field.null is False and value is None): + names = [old_fields.name for old_fields + in old._meta.get_fields()] + combined_names = "(" + ")|(".join(names) + ")" + matches = re.search('(ano_\w+)', combined_names) + if not matches: + warn(msg + '=> setting 0000-01-01 value to DateField') + value = '0001-01-01' + else: + value = '%d-01-01' % getattr(old, matches.group(0)) + warn(msg + "=> settig %s for not null DateField" % + (value)) if field_type == 'CharField' or field_type == 'TextField': if value is None: - warn( - "Field %s (%s) from model %s" - " => settig empty string '' for %s value" % - (field.name, field_type, field.model.__name__, - value)) + warn(msg + "=> settig empty string '' for %s value" % + (value)) value = '' setattr(new, field.name, value) @@ -198,6 +271,8 @@ class DataMigrator: obj.delete() info('Deleting unnecessary stubs...') self.delete_stubs() + info('Recreating unique constraints...') + recreate_constraints() def _do_migrate(self, obj): if isinstance(obj, AppConfig): @@ -220,21 +295,29 @@ class DataMigrator: legacy_model = legacy_app.get_model(legacy_model_name) legacy_pk_name = legacy_model._meta.pk.name + global stub_created + stub_created = False + # Clear all model entries # They may have been created in a previous migration attempt model.objects.all().delete() + delete_constraints(model) # setup migration strategy for tables with or without a pk if legacy_pk_name == 'id': # There is no pk in the legacy table def save(new, old): new.save() + global stub_created + stub_created = False old_records = iter_sql_records( 'select * from ' + legacy_model._meta.db_table, 'legacy') else: def save(new, old): + global stub_created save_with_id(new, getattr(old, legacy_pk_name)) + stub_created = False old_records = legacy_model.objects.all().order_by(legacy_pk_name)