diff options
Diffstat (limited to 'lib/sqlalchemy/sql/compiler.py')
| -rw-r--r-- | lib/sqlalchemy/sql/compiler.py | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/sqlalchemy/sql/compiler.py b/lib/sqlalchemy/sql/compiler.py index 353de2c48..3925b251d 100644 --- a/lib/sqlalchemy/sql/compiler.py +++ b/lib/sqlalchemy/sql/compiler.py @@ -4793,13 +4793,19 @@ class IdentifierPreparer(object): name = constraint.name if isinstance(name, elements._truncated_label): + # calculate these at format time so that ad-hoc changes + # to dialect.max_identifier_length etc. can be reflected + # as IdentifierPreparer is long lived if constraint.__visit_name__ == "index": max_ = ( self.dialect.max_index_name_length or self.dialect.max_identifier_length ) else: - max_ = self.dialect.max_identifier_length + max_ = ( + self.dialect.max_constraint_name_length + or self.dialect.max_identifier_length + ) if len(name) > max_: name = name[0 : max_ - 8] + "_" + util.md5_hex(name)[-4:] else: |