mongoose-schema

来源： https://stackoverflow.com/questions/61486919/difference-between-calling-of-pre-middleware-with-next-and-without-next

来源： https://stackoverflow.com/questions/52963763/how-to-insert-multiple-json-objects-to-one-property-of-a-schema

来源： https://stackoverflow.com/questions/52963763/how-to-insert-multiple-json-objects-to-one-property-of-a-schema

来源： https://stackoverflow.com/questions/63429244/joining-collections-sub-subdocument-with-other-collections-subdocument-using-agg

来源： https://stackoverflow.com/questions/64493785/mongodb-query-to-show-subdocument-as-maindocument-and-having-pagination-with-it

来源： https://stackoverflow.com/questions/52737661/mongoose-conditional-required-field-validation

来源： https://stackoverflow.com/questions/42541791/how-do-i-perform-a-find-query-in-mongoose

来源： https://stackoverflow.com/questions/42541791/how-do-i-perform-a-find-query-in-mongoose

来源： https://stackoverflow.com/questions/42541791/how-do-i-perform-a-find-query-in-mongoose

问题 I need to create schema for following data structure: { ... matrix: [ [{type: "A", count: 6}, {type: "B", count: 4}], [{type: "B", count: 1}, {type: "A", count: 2}, {type: "A", count: 1}], [{type: "C", count: 7}, {type: "A", count: 1}], ] } I tried to do so like this while defining my schema, but it caused validation errors: const cellSchema = new mongoose.Schema({ type: String, count: Number }); const matrixSchema = new mongoose.Schema({ ... matrix: [[cellSchema]] }); it seems that such a