javascript - Sequelize association where one of the models varies

Question

Let's say I have three models: Bucket Water and Sand. A Bucket can have an association with Water or Sand but not both. So in theory, my relationship definitions would look like this:

Bucket.hasOne(Water, { as: 'contents' })
Water.belongsTo(Bucket)

Bucket.hasOne(Sand, { as: 'contents' })
Sand.belongsTo(Bucket)

This should create a foreign key column on the Water and Sand tables referencing a bucket. And then, in theory, if I query Bucket.getContents() I'll get either the water or the sand object.

Is this legit? I couldn't find any examples of an association like this in the docs. Is there a better way to do it?

Although this is a contrived example, the reason for Water and Sand being different models is they each have a lot of columns that are unique to their model, so it makes sense to keep them separate than try to make one combined model.

Answer 1

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