mongodb-query

问题 Now, I have a document in my collection that I would like to delete on click, and those are comments inside the post document. Here's the structure: { "_id" : "design-patterns-vs-frameworks", "title" : "Design Patterns vs Frameworks", "category" : [ "Frameworks", " Design Patterns", " PHP" ], "date_time" : ISODate("2014-09-02T13:45:29.124Z"), "description" : "Frameworks vs Design Patterns", "content" : " Content!", "author" : "Maciej Sitko", "comments" : [ { "_id" : ObjectId(

问题 How to code MongoDB foreach Query in PHP ? Now i have to code the same MONGODB QUERY in PHP with iterator_to_array , i don't know how to get this query to execute in PHP. Now i stucked in this. i have given my data with some example. USED MONGO QUERY: db.getCollection('DRUM').find({'CODE': 'XXYYZZYY'}).forEach( function(doc) { print(doc.COLLECTION.DAY); }); Actual DB RECORD: { "CODE" : "XXYYZZYY", "COLLECTION" : { "DAY" : { "2017-06-05" : { "id" : 565455 }, "2017-06-15" : { "id" : 565445 } },

问题 My question is almost a duplicate of this question. The difference is that I am using minimongo within the Meteor framework/platform. Given this document: { "_id" : ObjectId("4d2d8deff4e6c1d71fc29a07"), "user_id" : "714638ba-2e08-2168-2b99-00002f3d43c0", "events" : [ { "handled" : { "name": "Mike", "visible": false }, "profile" : 10, "data" : "....." } { "handled" : { "name": "Shaun", "visible": false }, "profile" : 10, "data" : "....." } { "handled" : { "name": "Glen", "visible": true },

问题 First up, I know there is already questions out there with this error message, but I haven't found any that relate to the use of using interfaces with this type of query. I'm currently trying to update a MongoDB entity using the C# Driver 2.0. However, I'm getting an error when it's trying to build the query (I'm assuming it's the Builders<T>.Filter.Eq(i => i.Id, entity.Id) bit of code) and I'm getting the following error: Unable to determine the serialization information for i => i.Id. I've

问题 I have a collection referencing GridFS files, generally 1-2 files per record. The collections are reasonably large - about 705k records in the parent collection, and 790k GridFS files. Over time, there have become a number of orphaned GridFS files - the parent records were deleted, but the referenced files weren't. I'm now attempting to clean the orphaned files out of the GridFS collection. The problem with an approach like suggested here is that combining the 700k records into a single large

问题 With the reference of my previous question, I have a question about $lookup with add some conditions. You may get enough reference about question from below link description. Photo: {_id: 1, photo_name: '1.jpg', photo_description: 'description 1', album_id: 1, flag:1 }, {_id: 2, photo_name: '2.jpg', photo_description: 'description 2', album_id: 1, flag:1 }, {_id: 3, photo_name: '3.jpg', photo_description: 'description 3', album_id: 1, flag:1 }, {_id: 4, photo_name: '4.jpg', photo_description:

问题 Suppose I have a single document in my mongo collection that looks like this: { "_id": 123, "field_to_prune": { "keep_field_1": "some value", "random_field_1": "some value", "keep_field_2": "some value", "random_field_2": "some value", "random_field_3": "some value" } } I want to prune that document to look like this: { "_id": 123, "field_to_prune": { "keep_field_1": "some value", "keep_field_2": "some value" } } However, my issue is that I don't know what the "random" field names are. In

问题 I have a schema that is similar to this. {id: Number, line_items: [{ id: String, quantity: Number, review_request_sent :Boolean }], total_price: String, name: String, order_number: Number } What I want to find is all documents that don't have the field review_request_sent set for all items in the array. Example { id: 1, line_items: [ { id: 43, review_request_sent: true } ] }, { id: 2, line_items: [ { id: 1, review_request_sent: false }, { id: 39 }, ] }, { id: 3, line_items: [ { id: 23, review

问题 Having list of documents [ { "__v" : 21, "_id" : ObjectId("546330dbb8926d177052e9ff"), "code" : "WfvCc", "description" : "", "elements" : [ { "_id" : ObjectId("546471f61e13b76a0b20ccaf"), "comments" : [], "meta" : { "createdBy" : "545ab39ef1b0c88a695fcf8d", "modifiedAt" : "1415868918045", "createdAt" : "1415868918045" }, "title" : "awesome title", "votes" : { "count" : 3, "meta" : [ { "createdBy" : "545ab39ef1b0c88a695fcf8d", "_id" : ObjectId("546473831e13b76a0b20ccb7"), "createdAt" :

问题 I have following document: { _id : 21353456, username : "xy", text : "asdf", comments : [ { username : "User1", text : "hi", }, { username : "User2", text : "hi1", }, { username : "User3", text : "hi2", }, { username : "User4", text : "hi3", } ] } Now I want to get the username, text and comments with aggregation and project. In addition I also want a boolean if the comments array contains an username with "User1". I have this, but it doesn't work. db.posttest.aggregate( [ { $project: {