from django.db.models import Avg, Max, Min, Sum In [369]: from StoreWeb.models import Product, Price In [370]: Price.objects.all().aggregate(Min('value'))

[Mirian Pardo]

Hola, compañeros tengo este error al ejecutar las siguientes lines en el shell de django

from django.db.models import Avg, Max, Min, Sum                                                                 

In [369]: from  StoreWeb.models import Product, Price                                                                     

In [370]: Price.objects.all().aggregate(Min('value'))  

EROOR

OperationalError                          Traceback (most recent call last)
~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/utils.py in _execute(self, sql, params, *ignored_wrapper_args)
     85             else:
---> 86                 return self.cursor.execute(sql, params)
     87 

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/mysql/base.py in execute(self, query, args)
     73             # args is None means no string interpolation
---> 74             return self.cursor.execute(query, args)
     75         except Database.OperationalError as e:

~/env38/StoreVirtual/lib/python3.8/site-packages/MySQLdb/cursors.py in execute(self, query, args)
    205         assert isinstance(query, (bytes, bytearray))
--> 206         res = self._query(query)
    207         return res

~/env38/StoreVirtual/lib/python3.8/site-packages/MySQLdb/cursors.py in _query(self, q)
    318         self._result = None
--> 319         db.query(q)
    320         self._do_get_result(db)

~/env38/StoreVirtual/lib/python3.8/site-packages/MySQLdb/connections.py in query(self, query)
    258             query = bytes(query)
--> 259         _mysql.connection.query(self, query)
    260 

OperationalError: (2006, 'MySQL server has gone away')

The above exception was the direct cause of the following exception:

OperationalError                          Traceback (most recent call last)
<ipython-input-367-52af1526b6a5> in <module>
----> 1 Price.objects.all().aggregate(Min('value'))

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/models/query.py in aggregate(self, *args, **kwargs)
    382             if not query.annotations[alias].contains_aggregate:
    383                 raise TypeError("%s is not an aggregate expression" % alias)
--> 384         return query.get_aggregation(self.db, kwargs)
    385 
    386     def count(self):

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/models/sql/query.py in get_aggregation(self, using, added_aggregate_names)
    501         outer_query.select_related = False
    502         compiler = outer_query.get_compiler(using)
--> 503         result = compiler.execute_sql(SINGLE)
    504         if result is None:
    505             result = [None] * len(outer_query.annotation_select)

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/models/sql/compiler.py in execute_sql(self, result_type, chunked_fetch, chunk_size)
   1150             cursor = self.connection.cursor()
   1151         try:
-> 1152             cursor.execute(sql, params)
   1153         except Exception:
   1154             # Might fail for server-side cursors (e.g. connection closed)

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/utils.py in execute(self, sql, params)
     98     def execute(self, sql, params=None):
     99         with self.debug_sql(sql, params, use_last_executed_query=True):
--> 100             return super().execute(sql, params)
    101 
    102     def executemany(self, sql, param_list):

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/utils.py in execute(self, sql, params)
     66 
     67     def execute(self, sql, params=None):
---> 68         return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
     69 
     70     def executemany(self, sql, param_list):

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/utils.py in _execute_with_wrappers(self, sql, params, many, executor)
     75         for wrapper in reversed(self.db.execute_wrappers):
     76             executor = functools.partial(wrapper, executor)
---> 77         return executor(sql, params, many, context)
     78 
     79     def _execute(self, sql, params, *ignored_wrapper_args):

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/utils.py in _execute(self, sql, params, *ignored_wrapper_args)
     84                 return self.cursor.execute(sql)
     85             else:
---> 86                 return self.cursor.execute(sql, params)
     87 
     88     def _executemany(self, sql, param_list, *ignored_wrapper_args):

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/utils.py in __exit__(self, exc_type, exc_value, traceback)
     88                 if dj_exc_type not in (DataError, IntegrityError):
     89                     self.wrapper.errors_occurred = True
---> 90                 raise dj_exc_value.with_traceback(traceback) from exc_value
     91 
     92     def __call__(self, func):

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/utils.py in _execute(self, sql, params, *ignored_wrapper_args)
     84                 return self.cursor.execute(sql)
     85             else:
---> 86                 return self.cursor.execute(sql, params)
     87 
     88     def _executemany(self, sql, param_list, *ignored_wrapper_args):

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/mysql/base.py in execute(self, query, args)
     72         try:
     73             # args is None means no string interpolation
---> 74             return self.cursor.execute(query, args)
     75         except Database.OperationalError as e:
     76             # Map some error codes to IntegrityError, since they seem to be

~/env38/StoreVirtual/lib/python3.8/site-packages/MySQLdb/cursors.py in execute(self, query, args)
    204 
    205         assert isinstance(query, (bytes, bytearray))
--> 206         res = self._query(query)
    207         return res
    208 

~/env38/StoreVirtual/lib/python3.8/site-packages/MySQLdb/cursors.py in _query(self, q)
    317         db = self._get_db()
    318         self._result = None
--> 319         db.query(q)
    320         self._do_get_result(db)
    321         self._post_get_result()

~/env38/StoreVirtual/lib/python3.8/site-packages/MySQLdb/connections.py in query(self, query)
    257         if isinstance(query, bytearray):
    258             query = bytes(query)
--> 259         _mysql.connection.query(self, query)
    260 
    261     def _bytes_literal(self, bs):

OperationalError: (2006, 'MySQL server has gone away')