Function _warn_pk_with_no_anticipated_value

lib/sqlalchemy/sql/crud.py:1797–1816

(c)

def _warn_pk_with_no_anticipated_value(c):
    msg = (
        "Column '%s.%s' is marked as a member of the "
        "primary key for table '%s', "
        "but has no Python-side or server-side default generator indicated, "
        "nor does it indicate 'autoincrement=True' or 'nullable=True', "
        "and no explicit value is passed.  "
        "Primary key columns typically may not store NULL."
        % (c.table.fullname, c.name, c.table.fullname)
    )
    if len(c.table.primary_key) > 1:
        msg += (
            " Note that as of SQLAlchemy 1.1, 'autoincrement=True' must be "
            "indicated explicitly for composite (e.g. multicolumn) primary "
            "keys if AUTO_INCREMENT/SERIAL/IDENTITY "
            "behavior is expected for one of the columns in the primary key. "
            "CREATE TABLE statements are impacted by this change as well on "
            "most backends."
        )
    util.warn(msg)