From 3c71fb3909d4fdf6691712dfe84d7b7b8e9fcc35 Mon Sep 17 00:00:00 2001
From: Simon Charette <charette.s@gmail.com>
Date: Mon, 12 Mar 2018 11:58:00 -0400
Subject: [PATCH] Added PatternLookup.prepare_rhs to simplify subclasses.

---
 django/db/models/lookups.py | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/django/db/models/lookups.py b/django/db/models/lookups.py
index e5f620eb2c..00eeda1f39 100644
--- a/django/db/models/lookups.py
+++ b/django/db/models/lookups.py
@@ -377,6 +377,7 @@ class In(FieldGetDbPrepValueIterableMixin, BuiltinLookup):
 
 class PatternLookup(BuiltinLookup):
     param_pattern = '%%%s%%'
+    prepare_rhs = False
 
     def get_rhs_op(self, connection, rhs):
         # Assume we are in startswith. We need to produce SQL like:
@@ -404,39 +405,33 @@ class PatternLookup(BuiltinLookup):
 @Field.register_lookup
 class Contains(PatternLookup):
     lookup_name = 'contains'
-    prepare_rhs = False
 
 
 @Field.register_lookup
 class IContains(Contains):
     lookup_name = 'icontains'
-    prepare_rhs = False
 
 
 @Field.register_lookup
 class StartsWith(PatternLookup):
     lookup_name = 'startswith'
     param_pattern = '%s%%'
-    prepare_rhs = False
 
 
 @Field.register_lookup
 class IStartsWith(StartsWith):
     lookup_name = 'istartswith'
-    prepare_rhs = False
 
 
 @Field.register_lookup
 class EndsWith(PatternLookup):
     lookup_name = 'endswith'
     param_pattern = '%%%s'
-    prepare_rhs = False
 
 
 @Field.register_lookup
 class IEndsWith(EndsWith):
     lookup_name = 'iendswith'
-    prepare_rhs = False
 
 
 @Field.register_lookup