Mysql中JSON字段的值的实现示例

@router.get('/jsontest/{keyword}/{value}', description="获取mysql的json值测试")
async def search_(keyword: str, value: str):
    query = f"SELECT * FROM jsontest WHERE JSON_CONTAINS(info->'$.{keyword}','{value}')"
    conn = tortoise.Tortoise.get_connection("default")
    try:
        _, index_result = await conn.execute_query(query)
    except Exception as ex:
        error_msg = f"error:{ex.__class__.__name__}-{str(ex)}"
        log_it(error_msg, level=logging.ERROR)
        return JSONResponse(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, content=error_msg)
    finally:
        await conn.close()
    return JSONResponse(
        status_code=status.HTTP_200_OK,
        content=index_result
    )

SELECT * FROM jsontest WHERE JSON_CONTAINS(info->'$.age','30')

SELECT * FROM jsontest WHERE JSON_CONTAINS(code,'"ANOPQRSTU8"')

SELECT * FROM jsontest WHERE JSON_CONTAINS(info->'$.city','"New York"') AND JSON_CONTAINS(code,'"AWXYZ01239"')

SELECT * FROM jsontest WHERE JSON_CONTAINS_PATH(info, 'one', '$.city', '$.age');
SELECT * FROM jsontest WHERE JSON_CONTAINS_PATH(info, 'all', '$.city', '$.contact.email');

SELECT JSON_EXTRACT(info, '$.city','$.age','$.contact.email') AS name FROM jsontest WHERE name = 'Alice';
SELECT info->'$.city',info->'$.age',info->'$.contact.email' FROM jsontest WHERE name = 'Alice'

SELECT JSON_EXTRACT(code, '$[0]','$[1]','$[2]') AS res FROM jsontest WHERE name = 'Alice';
SELECT code->'$[0]',code->'$[1]',code->'$[2]' FROM jsontest WHERE name = 'Alice';
# 获取数组里面的所有数据
SELECT JSON_EXTRACT(code, '$[*]') AS res FROM jsontest WHERE name = 'Alice';
SELECT code->'$[*]'  FROM jsontest WHERE name = 'Alice';

SELECT JSON_UNQUOTE(JSON_EXTRACT(info, '$.contact.email')) AS email FROM jsontest WHERE name = 'Alice';

SELECT JSON_KEYS(info) AS k FROM jsontest WHERE name = 'Alice';
#查询嵌套字典的key
SELECT JSON_KEYS(info->'$.contact') AS k FROM jsontest WHERE name = 'Alice';

SELECT JSON_LENGTH(code, '$') as count  FROM jsontest WHERE name = 'Alice'
SELECT JSON_LENGTH(info, '$') as count  FROM jsontest WHERE name = 'Alice'
# 获取嵌套字典的长度
SELECT JSON_LENGTH(info->'$.contact') as count  FROM jsontest WHERE name = 'Alice'

# 搜索字典中的value，one_or_all: 指定搜索所有匹配项还是仅找到的第一个匹配项
SELECT JSON_SEARCH(info, 'all', "New York") AS search_result FROM jsontest
# 搜索数组中的值，%A%模糊搜索含有A的数据
SELECT JSON_SEARCH(code, 'all', '%A%') AS search_result FROM jsontest