MongoDB使用GraphQL查找和修改

Question

I am working on GraphQL mutation and need help here. My document looks like

{
    "_id" : ObjectId("5bc02db357146d0c385d4988"),
    "item_type" : "CategoryMapping",
    "id" : null,
    "CategoryGroupName" : "Mystries & Thriller",
    "CustomCategory" : [ 
        {
            "name" : "Private Investigator",
            "MappedBisacs" : [ 
                "investigator", 
                "Privately owned", 
                "Secret"
            ]
        },
{
            "name" : "Crime Investigator",
            "MappedBisacs" : [ 
                "crime investigator", 
                "crime thriller"
            ]
        }
    ]
}

UI

• Allow user to update MappedBisacs through list of checkbox. So user can add/update or delete list of bisacs.

Problem - When client send GraphQL query like following;

mutation {
  CategoryMapping_add(input: {CategoryGroupName: "Mystries & Thriller", CustomCategory: [{name: "Crime Investigator", MappedBisacs: ["investigator", "dafdfdaf", "dafsdf"]}]}) {
    clientMutationId
  }
}

I need to find Specific custom category and update its bisac array.

Answer 1

I am not sure if I got it, but this more a doubt on MongoDb than on GraphQL itself. First you must find the document that you want (I would use the id of the document instead of CategoryGroupName ), then you can update this array in several ways. For example, after you found the document, you could simply access the array content and spread into a new one adding this new data from your mutation, and save this object with the update method. (if you simply want to add new data without removing any) So, it depends on the case.

Check: https://docs.mongodb.com/manual/reference/operator/update-array/

Hope it helps! :)