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Validating Structs in Go
Verifying the validity of struct values is a crucial task in software development. When dealing with numerous small structs, individually checking each field can be cumbersome. Let's explore the idiomatic approach and an alternative solution for validating structs.
Idiomatic Validation
The example provided is a common approach for validating structs. Each field is checked individually using the struct's methods. However, this method becomes tedious as the number of fields or structs grows.
Alternative Solution
The Go community has developed various packages to simplify the validation process. One such package is the popular "go-validator" (https://github.com/go-validator/validator).
Using this package, you can define validation rules for each field using tags within the struct definition. The validator then automatically checks the values against the defined rules.
Example
Consider the following struct with validation rules:
<code class="go">import "github.com/go-validator/validator" type Event struct { Id int `validator:"min=1"` UserId int `validator:"min=1"` Start string `validator:"datetime"` End string `validator:"datetime"`</code>
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