Golang UserTypeDefinition.ToObject方法代码示例

func fieldAssignmentTypeToModel(model *RelationalModelDefinition, ut *design.UserTypeDefinition, utype, mtype string) string {
	// Get a sortable slice of field names
	var keys []string
	for k := range model.RelationalFields {
		keys = append(keys, k)
	}
	sort.Strings(keys)

	var fieldAssignments []string
	for _, fname := range keys {
		field := model.RelationalFields[fname]

		var mpointer, upointer bool
		mpointer = field.Nullable
		obj := ut.ToObject()
		definition := ut.Definition()
		if field.Datatype == "" {
			continue
		}
		for key := range obj {
			gfield := obj[key]
			if field.Underscore() == key || field.DatabaseFieldName == key {
				// this is our field
				if gfield.Type.IsObject() || definition.IsPrimitivePointer(key) {
					upointer = true
				} else {
					// set it explicitly because we're reusing the same bool
					upointer = false
				}

				var prefix string
				if upointer != mpointer {
					prefix = "*"
				}

				fa := fmt.Sprintf("\t%s.%s = %s%s.%s", mtype, fname, prefix, utype, codegen.Goify(key, true))
				fieldAssignments = append(fieldAssignments, fa)
			}
		}

	}
	return strings.Join(fieldAssignments, "\n")
}

// GoTypeTransform produces Go code that initializes the data structure defined by target from an
// instance of the data structure described by source. The algorithm matches object fields by name
// or using the value of the "transform:key" attribute metadata when present.
// The function returns an error if target is not compatible with source (different type, fields of
// different type etc). It ignores fields in target that don't have a match in source.
func GoTypeTransform(source, target *design.UserTypeDefinition, targetPkg, funcName string) (string, error) {
	var impl string
	var err error
	switch {
	case source.IsObject():
		if !target.IsObject() {
			return "", fmt.Errorf("source is an object but target type is %s", target.Type.Name())
		}
		impl, err = transformObject(source.ToObject(), target.ToObject(), targetPkg, target.TypeName, "source", "target", 1)
	case source.IsArray():
		if !target.IsArray() {
			return "", fmt.Errorf("source is an array but target type is %s", target.Type.Name())
		}
		impl, err = transformArray(source.ToArray(), target.ToArray(), targetPkg, "source", "target", 1)
	case source.IsHash():
		if !target.IsHash() {
			return "", fmt.Errorf("source is a hash but target type is %s", target.Type.Name())
		}
		impl, err = transformHash(source.ToHash(), target.ToHash(), targetPkg, "source", "target", 1)
	default:
		panic("cannot transform primitive types") // bug
	}

	if err != nil {
		return "", err
	}
	t := GoTypeRef(target, nil, 0)
	if strings.HasPrefix(t, "*") && len(targetPkg) > 0 {
		t = fmt.Sprintf("*%s.%s", targetPkg, t[1:])
	}
	data := map[string]interface{}{
		"Name":      funcName,
		"Source":    source,
		"Target":    target,
		"TargetRef": t,
		"TargetPkg": targetPkg,
		"Impl":      impl,
	}
	return RunTemplate(transformT, data), nil
}