A Go library for validating structs, maps and slices.

1. Simple

   Simple and stupid, no magic involved.

2. Type-safe

   Schema is defined in Go, which is type-safer (and more powerful) than traditional struct tags.

3. Flexible

   • Validators are composable.
   • Nested struct validation is well supported.
   • Schema can be defined inside or outside struct.
   • Validator customizations are made easy.

4. No reflection

$ go get github.com/RussellLuo/validating/v3@latest

To be strict, this library has a conceptual distinction between validator factory and validator.

A validator factory is a function used to create a validator, which will do the actual validation.

• Func
• Schema
• Value
• Nested
• Map
• Slice/Array
• All/And
• Any/Or
• Not
• Is
• Nonzero
• Zero
• ZeroOr
• LenString
• LenSlice
• RuneCount
• Eq
• Ne
• Gt
• Gte
• Lt
• Lte
• Range
• In
• Nin
• Match

• vext

• From a boolean function
• From a normal function
• From a struct

• Simple value
• Simple string (is IP?)
• Simple struct
• Simple slice
• Simple map
• Nested struct
• Nested struct (schema inside)
• Nested struct pointer
• Nested struct slice
• Nested struct map

Check out the Godoc.

This library borrows some ideas from the following libraries:

• mholt/binding

  Prefer no reflection.

• alecthomas/voluptuous

  Support composite validator factories All/And, Any/Or.

• go-validator/validator

  Use the term nonzero instead of required/optional.

MIT