[英]How to exclude an array of objects from mongoose find?
Lets pretend my collection holds following elements:假设我的收藏包含以下元素:
const Item = mongoose.Schema({
type: { type: String },
group: { type: Number }
});
[
{ type: "A", group: 1 },
{ type: "B", group: 1 },
{ type: "C", group: 1 },
{ type: "A", group: 2 },
{ type: "B", group: 2 },
{ type: "C", group: 2 },
]
Now I want to execute a find
operation but want to exclude following items:现在我想执行一个
find
操作,但想排除以下项目:
const items = [
{ type: "A", group: 1 },
{ type: "B", group: 1 },
];
const result = await Model.find({ /* ??? */ });
How does the query have to look to get the following response?查询必须如何查看才能获得以下响应?
const result = [
{ type: "C", group: 1 },
{ type: "A", group: 2 },
{ type: "B", group: 2 },
{ type: "C", group: 2 },
];
Try $nor operator, performs a logical NOR operation on an array of one or more query expression and selects the documents that fail all the query expressions in the array.尝试$nor运算符,对包含一个或多个查询表达式的数组执行逻辑 NOR 运算,并选择数组中所有查询表达式都失败的文档。
const items = [
{ type: "A", group: 1 },
{ type: "B", group: 1 },
];
const result = await Model.find({ $nor: items });
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