How to write similar functionality in node js (express)?

Question

Node.js

It will be easiest for me to explain with a specific example.
User 1 came to the page and has a unique ID (which I take from Beck). User 1 wants to create a task , he creates it and sets id : 1 for it ( id is entered through input on the front side ) . The task gets into the database and it has: 1) its id 2) the id of the user who created it. User 2 visited the page, he also has a unique user id . User 2 wants to create a task with id : 1, but it will not work for him ( id for each task is unique : true) because there is already such a task with such an id, since there is already a task with id 1 from user 1 in the tasks table. That is, I need to somehow connect users and task IDs so that this task id is considered for each user separately, and not for two / three / many at once. Maybe I'm thinking in the wrong direction, how is this even solved?

Answer 1

node.js and express have nothing to do with it, but what does it have to do with it - it's a database, and you didn't specify which database you are using.
In most databases that can unique, indexes are used for this, and indexes can be built not only on 1 field, but also on a group of fields. In your case, the unique index should consist of two fields - user_id and task_id, which will make them unique in pairs.
PS It seems to me not a good idea to let the user set the id himself, especially for those entities that the user can create more than one.