#29697: Complex query crashes with "missing FROM-clause entry for table"
-------------------------------------+-------------------------------------
Reporter: Dmitry | Owner: Can
| Sarıgöl
Type: Bug | Status: assigned
Component: Database layer | Version: 2.1
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Comment (by Can Sarıgöl):
Hello. I guess the problem is in trim start function. I want to change
this code like above. What do you think?
{{{
class Query:
"""A single SQL query."""
...
def trim_start(self, names_with_path):
...
lookup_tables = [
t for t in self.alias_map
if t in self._lookup_joins or t == self.base_table
]
# from_opts_tables for manage to define unref_alias table.
# before unref, make sure the table wasn't added
# in another from_opts as reference.
**from_opts_tables = [path.from_opts.db_table for path in
all_paths]**
for trimmed_paths, path in enumerate(all_paths):
...
# is the alias exists in another from_opts?
**if not alias in from_opts_tables:**
self.unref_alias(alias)
...
if self.alias_map[lookup_tables[trimmed_paths + 1]].join_type !=
LOUTER:
....
**if not lookup_tables[trimmed_paths] in from_opts_tables:**
self.unref_alias(lookup_tables[trimmed_paths])
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/29697#comment:3>
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