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Sequelize Model Validation

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Date and Length Validators

2:33 with Guil Hernandez

Use the isDate validator to check for valid date strings for the birthday field, and use the len (or length) validator to allow a password value only if it falls within a specific length (or an expected range) of characters.

Date formats

The DATEONLY data type follows the ISO international date format. It formats the date as: YYYY-MM-DD.

You could set the value to '12-02-2000', for example, or even 'December 2, 2000', and Sequelize would still format it to ISO 8601 for the database. This ensures that all dates are stored in a consistent format.

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    Now I'm going to use the isDate validator to check for validate strings for 0:00
    the birthday field and use the len or length validator to allow a password 0:06
    value only if it falls within a specific length or an expected range of characters. 0:11
    Earlier I used the notEmpty validator for 0:17
    the birthday attribute to disallow empty strings. 0:20
    You can use the isDate validator for that too, and to allow valid date strings only. 0:24
    In the birthday object, I'll change notEmpty to isDate, and 0:29
    change the custom error message to your birthday must be a valid date. 0:34
    Next, let's allow only password values that are between 8 and 0:46
    20 characters by adding the len property inside the password validate object. 0:51
    When you set a validator to an object, you can pass values or 0:57
    arguments to it via an args property. 1:01
    For example, if I wanted the password to be at least eight characters long, 1:04
    I can set args to 8. 1:08
    In this case, I'll set it to an array specifying the range between 8 and 20. 1:09
    And I'll once again use the msg property to set a custom error message. 1:17
    The password should be between 8 and 20 characters in length. 1:21
    Finally, I'll test the two new validators in Postman. 1:37
    First, I'll try sending a post request by setting the birthday 1:40
    field to jan and password to a short value like hello. 1:45
    I'll make sure to set a unique email address too. 1:49
    And this throws a sequelize validation error with the messages, 1:59
    your birthday must be a valid date and the password should be between 8 and 2:03
    20 characters and length. 2:08
    Changing birthday to 2000-12-02 and 2:10
    password to helloTreehouse works. 2:16
    I get back a 201 created status response. 2:21
    And if I make a get request to the API users routes, I see the new user, great. 2:24

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