Using this approach, it’s trivial to create your own custom directives to validate and manipulate field values. You can look at the code of graphql-constraint-directive as an example!
This is a guest post by [James Mortemore], who is a software engineer at [YLD]. He has an extensive background in API development & enterprise integration architecture.
Out of the box, GraphQL supports validating your inputs based on type information. For example, you can ensure that an argument is a particular scalar type, such as String or Int. You can also enforce the shape of object arguments using input object types. While this prevents a large class of possible errors, this doesn’t cater to more complex validation needs like enforcing the length of a string, or the size of a number.
Data validation is a very important thing for a web application. In this article i will let you know how to validate mobile phone number in laravel.
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What is Data Validation in Excel. Data validation is a feature in Excel used to control what a user can enter into a cell. Learn more about it with Examples.
This blog also assumes that you are familiar with GraphQL Schema Directives. If not, I recommend reading this Apollo documentation on Schema Directive. Authorization in GraphQL - Schema Directive vs GraphQL Shield