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Editorial Team
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Asked: 2026-06-02T23:50:48+00:00

I was using this command to create a model class Listing. However, I was

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I was using this command to create a model class “Listing”. However, I was interested in knowing the relationship between the datatypes of the model and the datatypes of the underlying database. In this case, it is PostgreSQL. So when I type this command:

rails generate scaffold Listing name:string

I want to know what are the possible values I can use to describe the types. What is that dependent on? The underlying database? If so then what happens if the underlying database changes later? Also, where can I get a list of the types I can use here and their capacity with an underlying db of PostgreSQL?

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  1. Editorial Team

    That command actually creates migrations for creating tables, etc, on the DB, so that’s where you should check the types supported.
    I would copy/paste here but I think there is no need to.

    http://guides.rubyonrails.org/migrations.html#supported-types

    UPDATE

    The link to the docs does not contain the information anymore. Go to this question Rails 4: List of available datatypes for the full list

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