[MySQL] [playhouse] [JSONField] contains() on the JSONField causes error: Incorrect arguments to ESCAPE

Having the following script that replicates the issue:

#!/usr/bin/env python

from peewee import *
from playhouse import mysql_ext

db = MySQLDatabase(
    "db", host="localhost", port=3306, user="user", password="password"
)

class t1(Model):
    id = IntegerField(primary_key=True)
    name = CharField(255) 
    message = mysql_ext.JSONField() 

    class Meta:
        database = db
        db_table = "t1"

db.connect()
db.create_tables([t1])
t1.truncate_table()
t1.insert_many(
    [
        {"id": 1, "name": "bar", "message": ["a \\ b"]},
        {"id": 2, "name": "bar", "message": ["a \\\\ b"]},
    ]
).execute()

key = "\\"

query = t1.select(t1.name).where(t1.name.contains(key) | t1.message.contains(key))

print(query) # SELECT `t1`.`name` FROM `t1` AS `t1` WHERE ((`t1`.`name` LIKE '%\\%' ESCAPE '\') OR (`t1`.`message` LIKE '"%\\\\%"' ESCAPE '"\\"'))

for r in query: # peewee.OperationalError: (1210, 'Incorrect arguments to ESCAPE')
    print(r)
    

It produces invalid query:

SELECT `t1`.`name` FROM `t1` AS `t1` WHERE ((`t1`.`name` LIKE '%\\\\%' ESCAPE '\\') OR (`t1`.`message` LIKE '\"%\\\\%\"' ESCAPE '\"\\\\\"'))

We are currently using the version 3.14.4, however the same issue is in the latest.

pip freeze | grep peewee
peewee==3.15.1

[coleifer]

3.15.2 released now, which contains this fix.

[coleifer]

Aha, thank you for your persistence – I spotted the bug. The escape sequence is being handled by the Json converter, which dumps these strings as json and creates invalid escapes.

This should be fixed in master now.