sequelize.js

问题 I am trying to create a hook beforeBulkUpdate and get new and previous values of a field. I tried using .reload() on the model and _previousDataValues but they only work on instances and not bulk create and update (I'm using bulk update). Is there a way to get the previous value of field using the beforeBulkUpdate hook? beforeBulkUpdate: (person) => { console.log(person.name) // 'John' (new name) Person.findOne({ where: { id: input.id } }).then(person => { person.reload().then(() => { console

问题 I am trying to create a hook beforeBulkUpdate and get new and previous values of a field. I tried using .reload() on the model and _previousDataValues but they only work on instances and not bulk create and update (I'm using bulk update). Is there a way to get the previous value of field using the beforeBulkUpdate hook? beforeBulkUpdate: (person) => { console.log(person.name) // 'John' (new name) Person.findOne({ where: { id: input.id } }).then(person => { person.reload().then(() => { console

问题 I have a User model and a Houses model in sequelize. I also have a UserHouse model that contains {user_id, house_id}. How do I populate values in the UserHouse model. I went through the sequelize documentation but could not get a clear idea. I need to know, how to insert user_id and house_id in UserHouse model. I also cannot understand what associations should I use between these models. Any help will be appreciated. Edited : One More issue: I have one more model HouseInfo that stores house

问题 Occurs when I run the sequelize-cli command sequelize db:seed:all When I try and seed an object as JSON I get the following error: ERROR: Invalid value { viewId: null, dateRanges: [ { startDate: null, endDate: null } ], samplingLevel: 'DEFAULT', dimensions: [ { name: 'ga:channelGrouping' } ], metrics: [ { expression: 'ga:users' } ] } This is my model module.exports = (Sequelize, DataTypes) => { const Report = Sequelize.define('Report', { name: { type: DataTypes.STRING, allowNull: false,

问题 /assets/?tags[]=foo&tags[]=bar Get requests to endpoint above should return only those records that contain ALL of the provided tags ( foo , bar ) My current attempt is returning any records that match ANY of the given tags. const { tags } = req.query; res.send( await Asset.findAll({ where: whereOptions, include: [ { model: AssetMime }, { model: Tag, as: 'tags', where: { title: { [Op.in]: tags, }, }, }, ], }) ); How can I modify my filter to return records where ALL tags match? 回答1: You can

问题 I was trying to query and return the sum of all records in the last 4 past weeks. I had it working however I while using timestamps. and I am trying to change the precision and and just use dates. briefly instead of timestamp ranges I want just date ranges. this what I had with timestamps. with date_ranges (range_name, range_dates) as ( values ('week_0', tstzrange ((now()-interval '6 days'), now(),'[]')) , ('week_1', tstzrange ((now()-interval '13 days'), (now()-interval '7 days'), '[]')) , (

问题 My question is: koa2 middleware '/info' ctx.res.body ------>front-end get Object doesn't have dataValues and other value .only have object like {a:1,b:2} In middleware I get ser it have so many key-value like {dataValue:{a:1,b:2},eviousDataValues:'xxx'} Why is the front-end Object not the same as 'ser' in ko2 middleware? this is my code let sequelize = new Sequelize('test', sqlOpt.name, sqlOpt.pwd, { host: sqlOpt.host, dialect: 'mysql', port: sqlOpt.port, pool: { max: 5000, min: 0, idle:

问题 I have the following Employee model for a MySQL database: var bcrypt = require('bcrypt'); module.exports = (sequelize, DataTypes) => { const Employee = sequelize.define( "Employee", { username: DataTypes.STRING, password: DataTypes.STRING, }, {} ); return Employee; }; Seeding the database is done by reading a .sql file containing 10,000+ employees via raw queries: sequelize.query(mySeedingSqlFileHere); The problem is that the passwords in the SQL file are plain text and I'd like to use bcrypt

问题 I'm trying to set associations in class methods but it's not working as it should! const User = sequelize.define('User', { email: DataTypes.STRING, password: DataTypes.STRING, }, { classMethods: { associate: (models) => { User.hasMany(models.AnotherModel, {foreignKey: 'userId'}); }, } }); But when i set associations outside of classMethods block it works: User.associate = function (models) { User.hasMany(models.AnotherModel, {foreignKey: 'userId'}); }; why the codes inside classMethods block

问题 Suppose, there is "Account" table in DB "A", and there is "ConversationHistory" table in DB "B". My pseudo initialized script is: // Connection Script var db1 = new Sequelize("A", user, password) var db2 = new Sequelize("B", user, password) // Association Account.hasMany(ConversationHistory, {foreignKey: "sender_id", as: "conversations", constraints: false}) ConversationHistory.belongsTo(Account, {foreignKey: "sender_id", as: "sender", constraints: false}); // But when I use include in