// 1. `POLYMORPHIC` tag
// 2. `POLYMORPHICTYPE` and `POLYMORPHICID` tag
func hasPolymorphicRelation(tagSettings map[string]string) bool {
	if _, ok := tagSettings["POLYMORPHIC"]; ok {
		return true
	}

	_, hasType := tagSettings["POLYMORPHICTYPE"]
	_, hasId := tagSettings["POLYMORPHICID"]

	return hasType && hasId
}

func (schema *Schema) setRelation(relation *Relationship) {

		Tag:                    fieldStruct.Tag,
		TagSettings:            tagSetting,
		Schema:                 schema,
		Creatable:              true,
		Updatable:              true,
		Readable:               true,
		PrimaryKey:             utils.CheckTruth(tagSetting["PRIMARYKEY"], tagSetting["PRIMARY_KEY"]),
		AutoIncrement:          utils.CheckTruth(tagSetting["AUTOINCREMENT"]),

		{Name: "ID", DBName: "company_id", BindNames: []string{"Base", "ID"}, DataType: schema.Int, Size: 64, TagSettings: map[string]string{"EMBEDDED": "EMBEDDED", "EMBEDDEDPREFIX": "company_"}},

					schema.PrimaryFields = append(schema.PrimaryFields, field)
				}
			}
		}

		if of, ok := schema.FieldsByName[field.Name]; !ok || of.TagSettings["-"] == "-" {
			schema.FieldsByName[field.Name] = field
		}
		if of, ok := schema.FieldsByBindName[bindName]; !ok || of.TagSettings["-"] == "-" {
			schema.FieldsByBindName[bindName] = field
		}

		field.setupValuerAndSetter()
	}