Method jsDiffTemplate

plugins/migratecmd/templates.go:132–295

(new *core.Collection, old *core.Collection)

}

func (p *plugin) jsDiffTemplate(new *core.Collection, old *core.Collection) (string, error) {
	if new == nil && old == nil {
		return "", errors.New("the diff template require at least one of the collection to be non-nil")
	}

	if new == nil {
		return p.jsDeleteTemplate(old)
	}

	if old == nil {
		return p.jsCreateTemplate(new)
	}

	upParts := []string{}
	downParts := []string{}
	varName := "collection"

	newMap, err := toMap(new)
	if err != nil {
		return "", err
	}

	oldMap, err := toMap(old)
	if err != nil {
		return "", err
	}

	// non-fields
	// -----------------------------------------------------------------

	upDiff := diffMaps(oldMap, newMap, "fields", "created", "updated")
	if len(upDiff) > 0 {
		downDiff := diffMaps(newMap, oldMap, "fields", "created", "updated")

		rawUpDiff, err := marhshalWithoutEscape(upDiff, "  ", "  ")
		if err != nil {
			return "", err
		}

		rawDownDiff, err := marhshalWithoutEscape(downDiff, "  ", "  ")
		if err != nil {
			return "", err
		}

		upParts = append(upParts, "// update collection data")
		upParts = append(upParts, fmt.Sprintf("unmarshal(%s, %s)", string(rawUpDiff), varName)+"\n")
		// ---
		downParts = append(downParts, "// update collection data")
		downParts = append(downParts, fmt.Sprintf("unmarshal(%s, %s)", string(rawDownDiff), varName)+"\n")
	}

	// fields
	// -----------------------------------------------------------------

	oldFieldsSlice, ok := oldMap["fields"].([]any)
	if !ok {
		return "", errors.New(`oldMap["fields"] is not []any`)
	}