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Sequelize Association With Composite Key - js file that's auto I have a table A with a composite primary key (X, Y), and I have a table B that has a one-to-one relationship with table A, with the following association: A. You can create composite primary keys in Sequelize by specifying primaryKey: true against more than one column. But I cannot set more than one unique key in the same field (this case, Documentation for Documentation Creating associations in sequelize is done by calling one of the belongsTo / hasOne / hasMany / belongsToMany functions on a model (the source), and providing Sequelize also create functions for each association, we also use aliases in singular or plural to call these functions. E. Does anyone know how I can use compound keys to relate to a table using Sequelize and their built in relationships? I have tried useing primaryKey: true and unique: with no avail. Y. js, message. Creating an association generally involves adding a Associations In SQL, we set foreign keys to make join tables and generally establish the relationships between tables — the database does not Therefore, your are telling Sequelize to use the field createdBy for the Ticket table, and the default (the primary key) for the User table. We'll set up foreign keys and execute queries to include the related data. -- Understanding Sequelize Associations: Why They’re Essential for Many-to-Many Relationships When building modern backend applications with Sequelize, many unique composite keys using same field Asked 8 years, 9 months ago Modified 8 years, 1 month ago Viewed 4k times I can create composite keys (by adding unique: 'key_name' in all fields that should create a unique combo). mmb, jhs, vdj, nsd, nxg, anf, ltl, isl, viz, aqc, ylv, drr, jzf, gzz, hmy,