Question

我有一个关于更新mongo集合的基本问题。

假设我有一个像这样的mongo文档：

{"Object_id:.....,"product_id":1234, "color":0}
{"Object_id:.....,"product_id":1234, "color":1} # note the same product_id
{"Object_id:.....,"product_id":12345, "color":0}

现在我想要的是：

如果product_id == 1234且颜色== 1：＃将该文档修改为color = 2

更新后

{"Object_id:.....,"product_id":1234, "color":0}
{"Object_id:.....,"product_id":1234, "color":2} # note the same product_id
{"Object_id:.....,"product_id":12345, "color":0}

Answer 1

按字面意思做你想做的事情：

db.foo.update({"product_id" : 1234, "color" : 1}, {$set : {"color" : 2}})

如果您多次出现product_id == 1234和color == 1，并且您想要更新所有内容（如果找到），那么它是：

db.foo.update({"product_id" : 1234, "color" : 1}, {$set : {"color" : 2}}, false, true)

在python中更新mongo

1 个答案: