From bff748df3e1e1c0077e02df2b77bda2b827ad129 Mon Sep 17 00:00:00 2001
From: Nick Pope <nick.pope@flightdataservices.com>
Date: Fri, 18 Jan 2019 22:44:09 +0000
Subject: [PATCH] Fixed #30115 -- Fixed SQLite introspection crash with a
 varchar primary key.

Removed obsolete max_length handling for CharField that caused the issue.
Regression in a35d2a4510d5beec398b1007aaa26492d6aedf97.
---
 django/db/backends/sqlite3/introspection.py | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/django/db/backends/sqlite3/introspection.py b/django/db/backends/sqlite3/introspection.py
index 2a5c64dd26..0d27c5511b 100644
--- a/django/db/backends/sqlite3/introspection.py
+++ b/django/db/backends/sqlite3/introspection.py
@@ -40,6 +40,7 @@ class FlexibleFieldLookupDict:
         'real': 'FloatField',
         'text': 'TextField',
         'char': 'CharField',
+        'varchar': 'CharField',
         'blob': 'BinaryField',
         'date': 'DateField',
         'datetime': 'DateTimeField',
@@ -47,14 +48,8 @@ class FlexibleFieldLookupDict:
     }
 
     def __getitem__(self, key):
-        key = key.lower()
-        try:
-            return self.base_data_types_reverse[key]
-        except KeyError:
-            size = get_field_size(key)
-            if size is not None:
-                return ('CharField', {'max_length': size})
-            raise KeyError
+        key = key.lower().split('(', 1)[0].strip()
+        return self.base_data_types_reverse[key]
 
 
 class DatabaseIntrospection(BaseDatabaseIntrospection):