Example usage for com.mongodb.client MongoCollection deleteOne

List of usage examples for com.mongodb.client MongoCollection deleteOne

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Introduction

In this page you can find the example usage for com.mongodb.client MongoCollection deleteOne.

Prototype

DeleteResult deleteOne(Bson filter);

Source Link

Document

Removes at most one document from the collection that matches the given filter.

Usage

From source file:controller.ProductController.java

public void delete(String attr, Object val) {
    MongoCollection<Document> booklist = db.getCollection("product");
    booklist.deleteOne(eq(attr, val));
}

From source file:controller.UserController.java

public void delete(String attr, Object val) {
    MongoCollection<Document> mongoCol = db.getCollection("user");
    mongoCol.deleteOne(eq(attr, val));
}

From source file:course.homework.Homework2_3.java

License:Apache License

public static void main(String[] args) {

    MongoClient client = new MongoClient();

    MongoDatabase database = client.getDatabase("students");
    final MongoCollection<Document> collection = database.getCollection("grades");

    Bson filter = Filters.eq("type", "homework");

    Bson sort = Sorts.descending("student_id", "score");

    Set<Object> keys = new HashSet<>();
    collection.find(filter).sort(sort).into(new ArrayList<Document>()).stream().forEach(doc -> {
        if (keys.contains(doc.get("student_id"))) {
            System.out.println("Already exists " + doc.get("student_id") + " = " + doc.get("score"));
            collection.deleteOne(Filters.eq("_id", doc.getObjectId("_id")));
        } else {/*  w w  w . j av  a2  s .  co m*/
            System.out.println("Does not exist " + doc.get("student_id") + " = " + doc.get("score"));
            keys.add(doc.get("student_id"));
        }
    });
}

From source file:course.homework.week2.RemoveLowest.java

License:Apache License

public static void main(final String[] args) {
    MongoClient client = new MongoClient();
    MongoDatabase numbersDB = client.getDatabase("students");
    MongoCollection<Document> grades = numbersDB.getCollection("grades");

    MongoCursor<Document> cursor = grades.find(eq("type", "homework")).sort(ascending("student_id", "score"))
            .iterator();/*from   w  w w . j a  v a2s .  c om*/

    Object studentId = -1;
    try {
        while (cursor.hasNext()) {
            Document entry = cursor.next();
            if (!entry.get("student_id").equals(studentId)) {
                System.out.println("Removing: " + entry);
                Object id = entry.get("_id");
                grades.deleteOne(eq("_id", id));

            }
            studentId = entry.get("student_id");
        }
    } finally {
        cursor.close();
    }
}

From source file:data.Activity.java

License:Open Source License

public void deleteFromDb(DBManagerMongo manager) throws Exception {
    MongoCollection<Document> coll = manager.getDb().getCollection("activity");
    DeleteResult result = coll.deleteOne(and(eq("id", getId()), eq("hash", getRemoteHash())));
    if (result.getDeletedCount() != 1)
        throw new Exception("Record was modified or not found");
}

From source file:data.Project.java

License:Open Source License

public void deleteFromDb(DBManagerMongo manager) throws Exception {
    MongoCollection<Document> coll = manager.getDb().getCollection("project");
    DeleteResult result = coll.deleteOne(and(eq("id", getId()), eq("hash", getRemoteHash())));
    if (result.getDeletedCount() != 1)
        throw new Exception("Record was modyfied or not found");

    MongoCollection members = manager.getDb().getCollection("project_member");
    members.deleteMany(eq("project_id", getId()));

    MongoCollection phases = manager.getDb().getCollection("project_phase");
    phases.deleteMany(eq("project_id", getId()));

    MongoCollection activities = manager.getDb().getCollection("activity");
    activities.deleteMany(eq("project_id", getId()));
}

From source file:data.ProjectMember.java

License:Open Source License

public void deleteFromDb(DBManagerMongo manager) throws Exception {
    MongoCollection<Document> coll = manager.getDb().getCollection("project_member");
    DeleteResult result = coll
            .deleteOne(and(and(eq("user_login_name", getUserLoginName()), eq("hash", getRemoteHash())),
                    eq("project_id", getProjectId())));
    if (result.getDeletedCount() != 1)
        throw new Exception("Record was modyfied or not found");

    MongoCollection activity = manager.getDb().getCollection("activity");
    activity.deleteMany(and(eq("project_id", getProjectId()), eq("user_login_name", getUserLoginName())));
}

From source file:data.ProjectPhase.java

License:Open Source License

public void deleteFromDb(DBManagerMongo manager) throws Exception {
    MongoCollection<Document> coll = manager.getDb().getCollection("project_phase");
    DeleteResult result = coll.deleteOne(and(eq("id", getId()), eq("hash", getRemoteHash())));
    if (result.getDeletedCount() != 1)
        throw new Exception("Record was modyfied or not found");

    MongoCollection activities = manager.getDb().getCollection("activity");
    activities.deleteMany(eq("project_phase_id", getId()));
}

From source file:data.User.java

License:Open Source License

public void deleteFromDb(DBManagerMongo manager) throws Exception {
    ArrayList<Project> ownedProjects = Project.getProjectsByUserName(getLoginName(), manager);
    for (Project p : ownedProjects)
        p.deleteFromDb(manager);//from   w ww  .  j ava  2 s . c  o m

    MongoCollection<Document> coll = manager.getDb().getCollection("user");
    DeleteResult result = coll.deleteOne(and(eq("login_name", getLoginName()), eq("hash", getRemoteHash())));
    if (result.getDeletedCount() != 1)
        throw new Exception("Record was modyfied or not found");

    MongoCollection members = manager.getDb().getCollection("project_member");
    members.deleteMany(eq("user_login_name", getLoginName()));

    MongoCollection activities = manager.getDb().getCollection("activity");
    activities.deleteMany(eq("user_login_name", getLoginName()));

    MongoCollection project = manager.getDb().getCollection("project");
    project.deleteMany(eq("user_login_name", getLoginName()));
}

From source file:data.User.java

License:Open Source License

public void deleteFromDB(DBManagerMongo manager) throws Exception {
    ArrayList<Project> ownedProjects = Project.getProjectsByUserName(getLoginName(), manager);
    for (Project p : ownedProjects)
        p.deleteFromDb(manager);//from  w  ww .j  a v  a 2 s  . com

    MongoCollection<Document> coll = manager.getDb().getCollection("user");
    DeleteResult result = coll.deleteOne(and(eq("login_name", getLoginName()), eq("hash", getRemoteHash())));
    if (result.getDeletedCount() != 1)
        throw new Exception("Record was modyfied or not found");

    MongoCollection members = manager.getDb().getCollection("project_member");
    members.deleteMany(eq("user_login_name", getLoginName()));

    MongoCollection activities = manager.getDb().getCollection("activity");
    activities.deleteMany(eq("user_login_name", getLoginName()));

    MongoCollection project = manager.getDb().getCollection("project");
    project.deleteMany(eq("user_login_name", getLoginName()));
}