Fast and intuitive validation library for Go

This lib uses the Is... validation functions from the govalidator project.

Installation

go get github.com/tiendc/go-validator

Usage

    type Person struct {
        Name      string
        Birthdate time.Time

        Unemployed bool
        Salary     uint
        Rank       string
        WorkEmail  string
    }

    p := Person{
        Name:       "",
        Unemployed: false,
        Rank:       "Manager",
        Salary:     1000,
    }

    errs := Validate(
        Required(&p.Name),
        StrLen(&p.Name, 3, 100).OnError(
            SetField("name", nil),
            SetCustomKey("ERR_PERSON_NAME_REQUIRED"),
        ),
        Required(&p.Birthdate),
        When(!p.Unemployed).Then(
            Required(&p.Salary),

            // WorkEmail is required and must be valid
            Required(&p.WorkEmail),
            StrIsEmail(&p.WorkEmail),
            // OR use this to produce only one error when the validation fails
            Group(
                Required(&p.WorkEmail),
                StrIsEmail(&p.WorkEmail),
            ).OnError(...),

            StrIn(&p.Rank, "Employee", "Manager", "Director"),
            Case(
                When(p.Rank == "Manager").Then(NumGT(&p.Salary, 10000)),
                When(p.Rank == "Director").Then(NumGT(&p.Salary, 30000)),
            ).Default(
                NumLT(&p.Salary, 10000),
            ),
        ).Else(
            NumEQ(&p.Salary, 0),
            StrEQ(&p.WorkEmail, ""),
        ),

        // OTHERS
        // Pass if at least one of the validations passes
        OneOf(
            // List of validations
        ),

        // Pass if exact one of the validations passes
        ExactOneOf(
            // List of validations
        ),

        // Pass if none of the validations passes
        NotOf(
            // List of validations
        ),
    )

    for _, e := range errs {
        detail, warnErr := e.BuildDetail()
        fmt.Printf("%+v\n", detail)
    }

Contributing

• You are welcome to make pull requests for new functions and bug fixes.

Authors

• Dao Cong Tien (tiendc)

License

• MIT License