Lookups: statwith is handle by BuiltinLookup.

Author: WaVEV

django_mongodb/lookups.py

@@ -7,7 +7,6 @@
     Exact,
     IntegerFieldOverflow,
     IsNull,
-    StartsWith,
 )
 from django.db.models.sql.where import AND, XOR, WhereNode
 
@@ -90,12 +89,6 @@ def contains(self, compiler, connection):
     return {lhs_mql: safe_regex("%s")(value)}
 
 
-def starts_with(self, compiler, connection):
-    lhs_mql = process_lhs(self, compiler, connection)
-    value = process_rhs(self, compiler, connection)
-    return {lhs_mql: safe_regex("^%s")(value)}
-
-
 def is_null(self, compiler, connection):
     lhs_mql = process_lhs(self, compiler, connection)
     return {lhs_mql: None} if self.rhs is True else {lhs_mql: {"$ne": None}}
@@ -119,7 +112,6 @@ def builtin_lookup(self, compiler, connection):
 def register_lookups():
     WhereNode.as_mql = where_node
     Exact.as_mql = exact
-    StartsWith.as_mql = starts_with
     IsNull.as_mql = is_null
     Contains.as_mql = contains
     In.as_mql = in_