JeanBaptisteINITIATIVES edited a comment on issue #9736:
URL: 
https://github.com/apache/incubator-superset/issues/9736#issuecomment-623878554


   > Please provide a detailed error description and/or log. What is the output 
of 'superset db upgrade'? If it succeeded, did you also run 'superset init' 
subsequently?
   
   @rumbin , this is the error log when running 'superset db upgrade' AFTER 
changing the config.py (my mistake...) 👍 
   ```
   logging was configured successfully
   INFO:superset.utils.logging_configurator:logging was configured successfully
   
/home/superset/superset/lib/python3.6/site-packages/flask_caching/__init__.py:189:
 UserWarning: Flask-Caching: CACHE_TYPE is set to null, caching is effectively 
disabled.
     "Flask-Caching: CACHE_TYPE is set to null, "
   INFO  [alembic.runtime.migration] Context impl PostgresqlImpl.
   INFO  [alembic.runtime.migration] Will assume transactional DDL.
   INFO  [alembic.runtime.migration] Running upgrade def97f26fdfb -> 
11c737c17cc6, deprecate_restricted_metrics
   INFO  [alembic.runtime.migration] Running upgrade 11c737c17cc6 -> 
258b5280a45e, form strip leading and trailing whitespace
   INFO  [alembic.runtime.migration] Running upgrade 258b5280a45e -> 
1495eb914ad3, time range
   INFO  [alembic.runtime.migration] Running upgrade 1495eb914ad3 -> 
b6fa807eac07, make_names_non_nullable
   INFO  [alembic.runtime.migration] Running upgrade b6fa807eac07 -> 
cca2f5d568c8, add encrypted_extra to dbs
   INFO  [alembic.runtime.migration] Running upgrade cca2f5d568c8 -> 
c2acd2cf3df2, alter type of dbs encrypted_extra
   INFO  [alembic.runtime.migration] Running upgrade c2acd2cf3df2 -> 
78ee127d0d1d, reconvert legacy filters into adhoc
   INFO  [alembic.runtime.migration] Running upgrade 78ee127d0d1d -> 
db4b49eb0782, Add tables for SQL Lab state
   INFO  [alembic.runtime.migration] Running upgrade db4b49eb0782 -> 
5afa9079866a, serialize_schema_permissions.py
   INFO  [alembic.runtime.migration] Running upgrade 5afa9079866a -> 
89115a40e8ea, Change table schema description to long text
   INFO  [alembic.runtime.migration] Running upgrade 89115a40e8ea -> 
817e1c9b09d0, add_not_null_to_dbs_sqlalchemy_url
   INFO  [alembic.runtime.migration] Running upgrade 817e1c9b09d0 -> 
e96dbf2cfef0, datasource_cluster_fk
   Traceback (most recent call last):
     File "/home/superset/superset/bin/superset", line 21, in <module>
       superset()
     File "/home/superset/superset/lib/python3.6/site-packages/click/core.py", 
line 722, in __call__
       return self.main(*args, **kwargs)
     File "/home/superset/superset/lib/python3.6/site-packages/flask/cli.py", 
line 586, in main
       return super(FlaskGroup, self).main(*args, **kwargs)
     File "/home/superset/superset/lib/python3.6/site-packages/click/core.py", 
line 697, in main
       rv = self.invoke(ctx)
     File "/home/superset/superset/lib/python3.6/site-packages/click/core.py", 
line 1066, in invoke
       return _process_result(sub_ctx.command.invoke(sub_ctx))
     File "/home/superset/superset/lib/python3.6/site-packages/click/core.py", 
line 1066, in invoke
       return _process_result(sub_ctx.command.invoke(sub_ctx))
     File "/home/superset/superset/lib/python3.6/site-packages/click/core.py", 
line 895, in invoke
       return ctx.invoke(self.callback, **ctx.params)
     File "/home/superset/superset/lib/python3.6/site-packages/click/core.py", 
line 535, in invoke
       return callback(*args, **kwargs)
     File 
"/home/superset/superset/lib/python3.6/site-packages/click/decorators.py", line 
17, in new_func
       return f(get_current_context(), *args, **kwargs)
     File "/home/superset/superset/lib/python3.6/site-packages/flask/cli.py", 
line 426, in decorator
       return __ctx.invoke(f, *args, **kwargs)
     File "/home/superset/superset/lib/python3.6/site-packages/click/core.py", 
line 535, in invoke
       return callback(*args, **kwargs)
     File 
"/home/superset/superset/lib/python3.6/site-packages/flask_migrate/cli.py", 
line 134, in upgrade
       _upgrade(directory, revision, sql, tag, x_arg)
     File 
"/home/superset/superset/lib/python3.6/site-packages/flask_migrate/__init__.py",
 line 95, in wrapped
       f(*args, **kwargs)
     File 
"/home/superset/superset/lib/python3.6/site-packages/flask_migrate/__init__.py",
 line 280, in upgrade
       command.upgrade(config, revision, sql=sql, tag=tag)
     File 
"/home/superset/superset/lib/python3.6/site-packages/alembic/command.py", line 
298, in upgrade
       script.run_env()
     File 
"/home/superset/superset/lib/python3.6/site-packages/alembic/script/base.py", 
line 489, in run_env
       util.load_python_file(self.dir, "env.py")
     File 
"/home/superset/superset/lib/python3.6/site-packages/alembic/util/pyfiles.py", 
line 98, in load_python_file
       module = load_module_py(module_id, path)
     File 
"/home/superset/superset/lib/python3.6/site-packages/alembic/util/compat.py", 
line 173, in load_module_py
       spec.loader.exec_module(module)
     File "<frozen importlib._bootstrap_external>", line 678, in exec_module
     File "<frozen importlib._bootstrap>", line 219, in 
_call_with_frames_removed
     File 
"/home/superset/superset/lib/python3.6/site-packages/superset/migrations/env.py",
 line 115, in <module>
       run_migrations_online()
     File 
"/home/superset/superset/lib/python3.6/site-packages/superset/migrations/env.py",
 line 107, in run_migrations_online
       context.run_migrations()
     File "<string>", line 8, in run_migrations
     File 
"/home/superset/superset/lib/python3.6/site-packages/alembic/runtime/environment.py",
 line 846, in run_migrations
       self.get_context().run_migrations(**kw)
     File 
"/home/superset/superset/lib/python3.6/site-packages/alembic/runtime/migration.py",
 line 518, in run_migrations
       step.migration_fn(**kw)
     File 
"/home/superset/superset/lib/python3.6/site-packages/superset/migrations/versions/e96dbf2cfef0_datasource_cluster_fk.py",
 line 76, in upgrade
       "fk_datasources_cluster_id_clusters", "clusters", ["cluster_id"], ["id"]
     File "/usr/lib/python3.6/contextlib.py", line 88, in __exit__
       next(self.gen)
     File 
"/home/superset/superset/lib/python3.6/site-packages/alembic/operations/base.py",
 line 325, in batch_alter_table
       impl.flush()
     File 
"/home/superset/superset/lib/python3.6/site-packages/alembic/operations/batch.py",
 line 79, in flush
       fn(*arg, **kw)
     File 
"/home/superset/superset/lib/python3.6/site-packages/alembic/ddl/impl.py", line 
241, in drop_constraint
       self._exec(schema.DropConstraint(const))
     File 
"/home/superset/superset/lib/python3.6/site-packages/alembic/ddl/impl.py", line 
134, in _exec
       return conn.execute(construct, *multiparams, **params)
     File 
"/home/superset/superset/lib/python3.6/site-packages/sqlalchemy/engine/base.py",
 line 982, in execute
       return meth(self, multiparams, params)
     File 
"/home/superset/superset/lib/python3.6/site-packages/sqlalchemy/sql/ddl.py", 
line 72, in _execute_on_connection
       return connection._execute_ddl(self, multiparams, params)
     File 
"/home/superset/superset/lib/python3.6/site-packages/sqlalchemy/engine/base.py",
 line 1037, in _execute_ddl
       else None,
     File "<string>", line 1, in <lambda>
     File 
"/home/superset/superset/lib/python3.6/site-packages/sqlalchemy/sql/elements.py",
 line 462, in compile
       return self._compiler(dialect, bind=bind, **kw)
     File 
"/home/superset/superset/lib/python3.6/site-packages/sqlalchemy/sql/ddl.py", 
line 29, in _compiler
       return dialect.ddl_compiler(dialect, self, **kw)
     File 
"/home/superset/superset/lib/python3.6/site-packages/sqlalchemy/sql/compiler.py",
 line 319, in __init__
       self.string = self.process(self.statement, **compile_kwargs)
     File 
"/home/superset/superset/lib/python3.6/site-packages/sqlalchemy/sql/compiler.py",
 line 350, in process
       return obj._compiler_dispatch(self, **kwargs)
     File 
"/home/superset/superset/lib/python3.6/site-packages/sqlalchemy/ext/compiler.py",
 line 436, in <lambda>
       lambda *arg, **kw: existing(*arg, **kw),
     File 
"/home/superset/superset/lib/python3.6/site-packages/sqlalchemy/ext/compiler.py",
 line 478, in __call__
       return fn(element, compiler, **kw)
     File 
"/home/superset/superset/lib/python3.6/site-packages/sqlalchemy/ext/compiler.py",
 line 423, in _wrap_existing_dispatch
       return existing_dispatch(element, compiler, **kw)
     File 
"/home/superset/superset/lib/python3.6/site-packages/sqlalchemy/sql/visitors.py",
 line 92, in _compiler_dispatch
       return meth(self, **kw)
     File 
"/home/superset/superset/lib/python3.6/site-packages/sqlalchemy/sql/compiler.py",
 line 3092, in visit_drop_constraint
       "it has no name" % drop.element
   sqlalchemy.exc.CompileError: Can't emit DROP CONSTRAINT for constraint 
UniqueConstraint(); it has no name
   ```


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