如何从 Django 打印 sql 查询，因为 Debug 是 False

Question

来自文档how can I see the raw SQL queries Django is running?

我可以通过以下方式执行 sql：

from django.db import connection
connection.queries

但它只在Debug == True时可用

如何将sql打印为Debug == False？

谢谢

更新

我想要这样的东西：

from django.db import connection
from django.db import reset_queries

reset_queries()  # Clears the query.
with transaction.atomic():
    r = Amodel.objects.create(
        ...
    )

    Bmodel.objects.filter(id__in=handle_ids_).update(status=4)

# Prints the sql executed in this transaction block.
logger.info("[sql_execute]: {}".format(connection.queries))

Answer 1

您可以使用Database instrumentation [Django docs]，它基本上提供了一个挂钩，用于安装围绕执行数据库查询的包装函数。使用它，您可以像这样简单地制作一个包装器：

class QueryLogger:

    def __init__(self):
        self.queries = []
        self.errored = False

    def __call__(self, execute, sql, params, many, context):
        current_query = {'sql': sql, 'params': params, 'many': many}
        try:
            result = execute(sql, params, many, context)
        except Exception as e:
            self.errored = True
            current_query['status'] = 'error'
            current_query['exception'] = e
            raise
        else:
            current_query['status'] = 'ok'
            return result
        finally:
            self.queries.append(current_query)

然后在你的视图中使用它：

from django.db import connection


ql = QueryLogger()

with connection.execute_wrapper(ql), transaction.atomic():
    r = Amodel.objects.create(
        ...
    )
    Bmodel.objects.filter(id__in=handle_ids_).update(status=4)

if not ql.errored:
    for query in ql.queries:
        print(query)
else:
    print("Some error occured")