fix 4396

adapter/context/param/options.go

@@ -0,0 +1,45 @@
+package param
+
+import (
+	"github.com/beego/beego/v2/server/web/context/param"
+)
+
+// MethodParamOption defines a func which apply options on a MethodParam
+type MethodParamOption func(*MethodParam)
+
+// IsRequired indicates that this param is required and can not be omitted from the http request
+var IsRequired MethodParamOption = func(p *MethodParam) {
+	param.IsRequired((*param.MethodParam)(p))
+}
+
+// InHeader indicates that this param is passed via an http header
+var InHeader MethodParamOption = func(p *MethodParam) {
+	param.InHeader((*param.MethodParam)(p))
+}
+
+// InPath indicates that this param is part of the URL path
+var InPath MethodParamOption = func(p *MethodParam) {
+	param.InPath((*param.MethodParam)(p))
+}
+
+// InBody indicates that this param is passed as an http request body
+var InBody MethodParamOption = func(p *MethodParam) {
+	param.InBody((*param.MethodParam)(p))
+}
+
+// Default provides a default value for the http param
+func Default(defaultValue interface{}) MethodParamOption {
+	return newMpoToOld(param.Default(defaultValue))
+}
+
+func newMpoToOld(n param.MethodParamOption) MethodParamOption {
+	return func(methodParam *MethodParam) {
+		n((*param.MethodParam)(methodParam))
+	}
+}
+
+func oldMpoToNew(old MethodParamOption) param.MethodParamOption {
+	return func(methodParam *param.MethodParam) {
+		old((*MethodParam)(methodParam))
+	}
+}