sequelize.js

问题 I currently have an app where users can log in and make posts. Next to each post, there is button that if pressed, the current user can send a message to the user who created the post. I have a posts model and a user model. Each user can post as many posts as they want, but each post only belongs to one user. const User = db.define( "User", { id: { type: Sequelize.INTEGER, primaryKey: true, autoIncrement: true, }, name: { type: Sequelize.STRING, }, email: { type: Sequelize.STRING, }, password

问题 I need to display nested JSON Object coming from my backend as the column fields of my MatTableDataSource. This is my JSON Object: [{ "workstationId": 100, "assemblylineId": 100, "workstationDescription": "Testing1", "workstationTest": "Yes", "createdAt": "2019-03-20", "updatedAt": "2019-03-20", "assemblylines": [{ "assemblylineName": "assembly1" }] }, { "workstationId": 101, "assemblylineId": 100, "workstationDescription": "workstation1", "workstationTest": "No", "createdAt": "2019-04-04",

问题 I need to display nested JSON Object coming from my backend as the column fields of my MatTableDataSource. This is my JSON Object: [{ "workstationId": 100, "assemblylineId": 100, "workstationDescription": "Testing1", "workstationTest": "Yes", "createdAt": "2019-03-20", "updatedAt": "2019-03-20", "assemblylines": [{ "assemblylineName": "assembly1" }] }, { "workstationId": 101, "assemblylineId": 100, "workstationDescription": "workstation1", "workstationTest": "No", "createdAt": "2019-04-04",

问题 I need to display nested JSON Object coming from my backend as the column fields of my MatTableDataSource. This is my JSON Object: [{ "workstationId": 100, "assemblylineId": 100, "workstationDescription": "Testing1", "workstationTest": "Yes", "createdAt": "2019-03-20", "updatedAt": "2019-03-20", "assemblylines": [{ "assemblylineName": "assembly1" }] }, { "workstationId": 101, "assemblylineId": 100, "workstationDescription": "workstation1", "workstationTest": "No", "createdAt": "2019-04-04",

问题 Currently when a user likes a post, that like record gets added to my Likes table with the userId and the postId. Now, when a user is looking at a post, I want to determine if they liked the post before or not. I understand that to do so, I need to determine this in my get request when i am calling for the post information. When i am calling for post information, I need to check the Likes table for a record of the userId of the current user AND the postId for the current post. If this exists

问题 Currently when a user likes a post, that like record gets added to my Likes table with the userId and the postId. Now, when a user is looking at a post, I want to determine if they liked the post before or not. I understand that to do so, I need to determine this in my get request when i am calling for the post information. When i am calling for post information, I need to check the Likes table for a record of the userId of the current user AND the postId for the current post. If this exists

问题 I need to check if entry with specific ID exists in the database using Sequelize in Node.js function isIdUnique (id) { db.Profile.count({ where: { id: id } }) .then(count => { if (count != 0) { return false; } return true; }); } I call this function in an if statement but the result is always undefined if(isIdUnique(id)){...} 回答1: Update: see the answer which suggests using findOne() below. I personally prefer; this answer though describes an alternative approach. You are not returning from

问题 I need to check if entry with specific ID exists in the database using Sequelize in Node.js function isIdUnique (id) { db.Profile.count({ where: { id: id } }) .then(count => { if (count != 0) { return false; } return true; }); } I call this function in an if statement but the result is always undefined if(isIdUnique(id)){...} 回答1: Update: see the answer which suggests using findOne() below. I personally prefer; this answer though describes an alternative approach. You are not returning from

问题 I need to check if entry with specific ID exists in the database using Sequelize in Node.js function isIdUnique (id) { db.Profile.count({ where: { id: id } }) .then(count => { if (count != 0) { return false; } return true; }); } I call this function in an if statement but the result is always undefined if(isIdUnique(id)){...} 回答1: Update: see the answer which suggests using findOne() below. I personally prefer; this answer though describes an alternative approach. You are not returning from

来源： https://stackoverflow.com/questions/64387492/sequelize-find-coordinates-within-a-polygon