sequelize.js

问题 Is it possible to define a relationships in sequelize where multiple foreign keys are stored as an array in one field. Basically a belongsToMany but instead of an relation table all ids are stored comma separated in one field. Query would be with WHERE IN('1,5,7') . 回答1: You can do it, but definitely without foreign key constraints - there is no possibility of storing array of foreign keys. You can however create a column which will be an array of integers representing IDs of associated table

问题 Is it possible to define a relationships in sequelize where multiple foreign keys are stored as an array in one field. Basically a belongsToMany but instead of an relation table all ids are stored comma separated in one field. Query would be with WHERE IN('1,5,7') . 回答1: You can do it, but definitely without foreign key constraints - there is no possibility of storing array of foreign keys. You can however create a column which will be an array of integers representing IDs of associated table

问题 Is it possible to define a relationships in sequelize where multiple foreign keys are stored as an array in one field. Basically a belongsToMany but instead of an relation table all ids are stored comma separated in one field. Query would be with WHERE IN('1,5,7') . 回答1: You can do it, but definitely without foreign key constraints - there is no possibility of storing array of foreign keys. You can however create a column which will be an array of integers representing IDs of associated table

问题 I have two tables, where one table has the ID of the other. 1:1 relation. So something like EventFeedback somePrimaryKey userEventID UserEvent userEventID Sequalize has the relation defined with models.UserEvent.hasOne(models.EventFeedback, { foreignKey: 'userEventID' }); I need all entries in UserEvent that do not have an entry in EventFeedback , which is an exclusionary join. Stealing images from this article because they have nice individual images: They even give example code! SELECT

问题 recently I discovered this on the sequelize documentation where you can create using include. Now I trying to do it on my program but only creates the records of the "parent" model and not for the children. This is my model and my controller. var MainMenu = sequelize.define('MainMenu', { Name: { type: DataTypes.STRING(50) }, Day: { type: DataTypes.DATE }, RecordStatus:{ type: DataTypes.BOOLEAN, defaultValue: true }, DeletedAt: { type: DataTypes.DATE } }, { associate: function(models){ models

问题 recently I discovered this on the sequelize documentation where you can create using include. Now I trying to do it on my program but only creates the records of the "parent" model and not for the children. This is my model and my controller. var MainMenu = sequelize.define('MainMenu', { Name: { type: DataTypes.STRING(50) }, Day: { type: DataTypes.DATE }, RecordStatus:{ type: DataTypes.BOOLEAN, defaultValue: true }, DeletedAt: { type: DataTypes.DATE } }, { associate: function(models){ models

问题 I am creating an application about songs and artists, following is the database schema: Song has many Artists, and Artist has many Songs, this is a many to many relations, so I define a join table SongArtist : SongArtist Model: module.exports = function(sequelize, DataTypes) { var SongArtist = sequelize.define('SongArtist', { id: { type: DataTypes.INTEGER, allowNull: false, primaryKey: true, autoIncrement: true }, songId: { type: DataTypes.INTEGER, allowNull: false, }, artistId: { type:

问题 I am trying to join two tables, but getting an error message message: "user is not associated to availability!" .I have given the association in below user and availability models as suggested by someone. I would like to get data from following columns in tables user and availability for current date (today) alone. data from photo, position columns in user table. data from dailystatus column in Availability table. One thing I have noticed that if I remove the include: [{.. part then it will

问题 Why is it that in some of my models, sequelize WON’T create a new column for foreignkey ? BUT it does create for other models??? It’s frustrating and weird. For instance, in this User model, sequelize won’t create role_id . 'use strict'; module.exports = (sequelize, DataTypes) => { const User = sequelize.define('User', { id: { type: DataTypes.BIGINT, allowNull: false, autoIncrement: true, unique: true, primaryKey: true }, first_name: DataTypes.STRING, last_name: DataTypes.STRING }, {}); User

问题 I'm trying to get Sequelize migrations to run on each deploy to Elastic Beanstalk. I'm following the advice of the documentation, of other answers on Stack Overflow, and even a different project I've worked on in the past, and am using a .config file in my /.ebextensions folder: container_commands: 00_node_binary: command: "ln -sf `ls -td /opt/elasticbeanstalk/node-install/node-* | head -1`/bin/node /bin/node" 01_npm_binary: command: "ln -sf `ls -td /opt/elasticbeanstalk/node-install/node-* |