Web Reference: Jan 16, 2026 · This guide will walk you through defining composite primary keys, creating composite foreign keys, setting up associations, and performing CRUD operations with practical examples. Mar 13, 2015 · When Sequelize creates a table, the table definition does not have a composite FK. To solve this problem I use the afterSync hook on the model and a function that adds a FK to the table if it does not exist. Apr 25, 2025 · Sequelize will automatically create this model C (unless it already exists) and define the appropriate foreign keys on it. Note: In the examples above for belongsToMany, a string ('C') was passed to the through option.
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