[英]MongoDB - Pull multiple objects from an array
Hi I'm trying to remove multiple objects from an array that looks like this.嗨,我正在尝试从看起来像这样的数组中删除多个对象。
{
"_id" : ObjectId("5a7da1bda21d5f3e8cf005b3"),
"owner" : "1",
"group_name" : "PAASCU Board",
"group_members" : [
{
"faculty_name" : "Cheska Dela Rosa",
"faculty_number" : 2,
"_id" : ObjectId("5a7da1bda21d5f3e8cf005b5")
},
{
"faculty_name" : "Earl Sempio",
"faculty_number" : 7323,
"_id" : ObjectId("5a7da1bda21d5f3e8cf005b4")
},
{
"faculty_number" : 203,
"faculty_name" : "Sample",
"_id" : ObjectId("5a7dbf7952bd150a94d83958")
},
{
"faculty_number" : 8025,
"faculty_name" : "Sample Postman",
"_id" : ObjectId("5a7dc64a1cf5dd3d50167d53")
}
],
"__v" : 0 }
It works when I remove a single object using the$pull with this code.当我使用带有此代码的$pull删除单个对象时,它会起作用。
db.getCollection('groups').update({_id: ObjectId("5a7da1bda21d5f3e8cf005b3")}, {$pull: {"group_members": {"faculty_number":8025}}})
But what if I want to remove multiple objects with different faculty_number
?但是如果我想删除多个具有不同faculty_number
对象faculty_number
办? I tried using the $each
method just like how I add multiple objects in the array but it doesn't work well.我尝试使用$each
方法,就像在数组中添加多个对象一样,但效果不佳。
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