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Home/ Questions/Q 7997873
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Editorial Team
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Editorial Team
Asked: June 4, 20262026-06-04T15:04:22+00:00 2026-06-04T15:04:22+00:00

.references keyword in Rails migrations does not cause creation of foreign keys in PostgreSQL.

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“.references” keyword in Rails migrations does not cause creation of foreign keys in PostgreSQL. How to create them using Rails’ means only?

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  1. Editorial Team
    Editorial Team
    2026-06-04T15:04:24+00:00Added an answer on June 4, 2026 at 3:04 pm

    Rails doesn’t provide any help with foreign key constraints out of the box.

    The foreigner gem adds support for foreign keys, although you do need to specify them in addition to saying t.references :foo

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