sequelize.js

Here are some questions about features supported by sequelize ( sequelize project site ) that I would like to clear up before deciding whether or not to use it: Chaining (efficiency): when chaining multiple queries, are these collected into one request to the database (as a batch of operations), or is each one sent separately? Chaining (success/error): when chaining multiple queries, when is the success event emitted and what happens on error? Is "success" emitted only if all operations succeeded? And if there was an error, does it rollback all operations (i.e. are the chained operations

My models are: module.exports = function(sequelize, DataTypes) { var CommitFileStatistic; return CommitFileStatistic = sequelize.define('CommitFileStatistic', { additions: { type: DataTypes.INTEGER, allowNull: false }, deletions: { type: DataTypes.INTEGER, allowNull: false }, status: { type: DataTypes.STRING, allowNull: false }, fileSize: { type: DataTypes.INTEGER, allowNull: true }, levenshteinDelta: { type: DataTypes.INTEGER, allowNull: true }, fileHash: { type: DataTypes.STRING, allowNull: true } }, { classMethods: { associate: function(models) { CommitFileStatistic.belongsTo(models.Commit)

so I am trying to chain multiple sequelize requests together - to check if a grant exists in our database. However when I'm using the sequelize findOrCreate method I get a SequelizeUniqueConstraintError: Validation error and I can't figure out why. This is my fund model. module.exports = function(sequelize, DataTypes) { var Fund = sequelize.define("funds", { id: { type: DataTypes.INTEGER, field: 'id', primaryKey: true, unique: true, autoIncrement: true, }, title: { type: DataTypes.TEXT, field: 'title' }, tags: { type: DataTypes.ARRAY(DataTypes.TEXT), field: 'tags' }, minimum_age: { type:

I've been using feathersjs/nodejs over postgres db via sequelize. In my db i have Users table and Events table. They are twice in relation: events.belongsTo(models.users, { foreignKey: { name: 'creatorId', allowNull: false }, onDelete: 'CASCADE', as: 'creator' }); events.belongsToMany(models.users, { through: 'event_participants', as: 'participants', foreignKey: 'eventId', otherKey: 'userId' }); models.users.belongsToMany(events, { through: 'event_participants', as: 'events' }); Everything works just fine, table is created and with include im getting users inside of event as participants.

I'm trying to join 3 tables together Products , Suppliers and Categories and then get row with SupplierID = 13 . I have read How to implement many to many association in sequelize , there is explained how to associate 0:M . DB model: Code: var Sequelize = require('sequelize') var sequelize = new Sequelize('northwind', 'nodejs', 'nodejs', {dialect: 'mysql',}) var Project = require('sequelize-import')(__dirname + '/models', sequelize, { exclude: ['index.js'] }); Project.Suppliers.hasMany(Project.Products, {foreignKey: 'SupplierID'}); Project.Products.belongsTo(Project.Suppliers, {foreignKey:

I am struggling with calling a MS SQL Stored Proc using Sequelize. This is how i normally call the stored proc from SSMS USE [MYDB] GO DECLARE @return_value int EXEC @return_value = [dbo].[GetThings_ByLocation] @BeginDate = N'2016-06-23', @EndDate = N'2016-07-09', @LocationID = NULL SELECT 'Return Value' = @return_value GO How would i make this call using sequelize? Sequelize uses npm package Tedious ( https://www.npmjs.com/package/tedious ) to work with MS SQL. Connecting to the database is the same as others. You can use raw query to get results from stored procedures. sequelize.query(

I've got feathers.js functioning with mysql via sequelize. This is working, I can collect data from tables. Next step is to define 'joins' in the models. I have a table with a column 'status_id' and 'country_id'. These columns reference to an id in a metadata table. In SQL I would right: SELECT status.description, country.description, detail FROM details INNER JOIN metadata status ON (details.status_id = status.id AND status.type = 'status' INNER JOIN metadata country ON (details.country_id =country.id AND country.type = 'country') This metadata table won't be big in this case so hence this

Okay so i have the following three models Module: var Module = sequelize.define('module', { id: DataTypes.INTEGER, name: DataTypes.STRING, description: DataTypes.STRING, category_id: DataTypes.STRING, module_type_id: DataTypes.STRING, gives_score: DataTypes.INTEGER, duration: DataTypes.STRING, price: DataTypes.STRING }, { freezeTableName: true} ) Competence: Competence = sequelize.define('competence', { id: DataTypes.INTEGER, name: DataTypes.STRING, organization_id: DataTypes.INTEGER, competence_type_id: DataTypes.INTEGER },{freezeTableName:true}) Module_has_competence: Module_has_competence =