Method Bind

bind.go:124–138

Bind implements the `Binder#Bind` function. Binding is done in following order: 1) path params; 2) query params; 3) request body. Each step COULD override previous step bound values. For single source binding use their own methods BindBody, BindQueryParams, BindPathValues.

(c *Context, target any)

// Binding is done in following order: 1) path params; 2) query params; 3) request body. Each step COULD override previous
// step bound values. For single source binding use their own methods BindBody, BindQueryParams, BindPathValues.
func (b *DefaultBinder) Bind(c *Context, target any) error {
	if err := BindPathValues(c, target); err != nil {
		return err
	}
	// Only bind query parameters for GET/DELETE/HEAD to avoid unexpected behavior with destination struct binding from body.
	// For example a request URL `&id=1&lang=en` with body `{"id":100,"lang":"de"}` would lead to precedence issues.
	// The HTTP method check restores pre-v4.1.11 behavior to avoid these problems (see issue #1670)
	method := c.Request().Method
	if method == http.MethodGet || method == http.MethodDelete || method == http.MethodHead {
		if err := BindQueryParams(c, target); err != nil {
			return err
		}
	}
	return BindBody(c, target)
}

// bindFieldMeta is the cached, type-level reflection metadata for a single struct field. Reading struct
// tags (reflect.StructTag.Get) parses the tag string on every call, so for binding-heavy endpoints we