Required binding tags on bool fields do not work as expected

[bndw]

I'm attempting to enforce required JSON request fields using the binding="required" tag. I expected c.BindJSON to raise an error when a required field was not present, however, it also raises an error when a required bool field is set to false.

Is there a better way to enforce required JSON request bodies?

Here is an example:

func myHandler(c *gin.Context) {
    var req struct {
        Foo string `json:"foo" binding="required"`
        Bar bool   `json:"bar" binding="required"`
    }

    if err := c.BindJSON(&req); err != nil {
        // When a request's `foo` field is set to `false`, the following error is raised:
        // err="Key: '.Foo' Error:Field validation for 'Foo' failed on the 'required' tag"
    }
}

[bndw]

Looks like using a *bool will produce the desired behavior.

This may be worthwhile documenting somewhere in the examples.

[qeubar]

Just an update to whomever is still stuck with this bug. Addind *bool is not the entire solution. You must change the binding:"required" to binding:"exists".

Here is the documentation to back that up (gin uses this pkg for input obj validations):
https://godoc.org/gopkg.in/go-playground/validator.v8#hdr-Exists

[sneakycrowllc]

Just an update to whomever is still stuck with this bug. Addind *bool is not the entire solution. You must change the binding:"required" to binding:"exists".

Here is the documentation to back that up (gin uses this pkg for input obj validations):
https://godoc.org/gopkg.in/go-playground/validator.v8#hdr-Exists

If you're using v9 and you need to require a bool, just use *bool (no binding:"exists" necessary, binding:"required" will work)