typeorm
Version:
Data-Mapper ORM for TypeScript and ES2023+. Supports MySQL/MariaDB, PostgreSQL, MS SQL Server, Oracle, SAP HANA, SQLite, MongoDB databases.
112 lines • 5.55 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.DocumentToEntityTransformer = void 0;
/**
* Transforms raw document into entity object.
* Entity is constructed based on its entity metadata.
*/
class DocumentToEntityTransformer {
// -------------------------------------------------------------------------
// Constructor
// -------------------------------------------------------------------------
constructor(enableRelationIdValues = false) {
this.enableRelationIdValues = enableRelationIdValues;
}
// -------------------------------------------------------------------------
// Public Methods
// -------------------------------------------------------------------------
transformAll(documents, metadata) {
return documents.map((document) => this.transform(document, metadata));
}
transform(document, metadata) {
const entity = metadata.create(undefined, {
fromDeserializer: true,
});
let hasData = false;
// handle _id property the special way
if (metadata.objectIdColumn) {
// todo: we can't use driver in this class
// do we really need prepare hydrated value here? If no then no problem. If yes then think maybe prepareHydratedValue process should be extracted out of driver class?
// entity[metadata.ObjectIdColumn.propertyName] = this.driver.prepareHydratedValue(document[metadata.ObjectIdColumn.name"], metadata.ObjectIdColumn);
const { databaseNameWithoutPrefixes, propertyName } = metadata.objectIdColumn;
const documentIdWithoutPrefixes = document[databaseNameWithoutPrefixes];
const documentIdWithPropertyName = document[propertyName];
if (documentIdWithoutPrefixes) {
entity[propertyName] = documentIdWithoutPrefixes;
hasData = true;
}
else if (documentIdWithPropertyName) {
entity[propertyName] = documentIdWithPropertyName;
hasData = true;
}
}
// add special columns that contains relation ids
if (this.enableRelationIdValues) {
metadata.columns
.filter((column) => !!column.relationMetadata)
.forEach((column) => {
const valueInObject = document[column.databaseNameWithoutPrefixes];
if (valueInObject !== undefined &&
valueInObject !== null &&
column.propertyName) {
// todo: we can't use driver in this class
// const value = this.driver.prepareHydratedValue(valueInObject, column);
entity[column.propertyName] = valueInObject;
hasData = true;
}
});
}
// get value from columns selections and put them into object
metadata.ownColumns.forEach((column) => {
const valueInObject = document[column.databaseNameWithoutPrefixes];
if (valueInObject !== undefined &&
column.propertyName &&
!column.isVirtual) {
// const value = this.driver.prepareHydratedValue(valueInObject, column);
entity[column.propertyName] = valueInObject;
hasData = true;
}
});
const addEmbeddedValuesRecursively = (entity, document, embeddeds) => {
embeddeds.forEach((embedded) => {
if (!document[embedded.prefix])
return;
if (embedded.isArray) {
entity[embedded.propertyName] = document[embedded.prefix].map((subValue, index) => {
const newItem = embedded.create({
fromDeserializer: true,
});
embedded.columns.forEach((column) => {
newItem[column.propertyName] =
subValue[column.databaseNameWithoutPrefixes];
});
addEmbeddedValuesRecursively(newItem, document[embedded.prefix][index], embedded.embeddeds);
return newItem;
});
}
else {
if (embedded.embeddeds.length &&
!entity[embedded.propertyName])
entity[embedded.propertyName] = embedded.create({
fromDeserializer: true,
});
embedded.columns.forEach((column) => {
const value = document[embedded.prefix][column.databaseNameWithoutPrefixes];
if (value === undefined)
return;
entity[embedded.propertyName] ??= embedded.create({
fromDeserializer: true,
});
entity[embedded.propertyName][column.propertyName] =
value;
});
addEmbeddedValuesRecursively(entity[embedded.propertyName], document[embedded.prefix], embedded.embeddeds);
}
});
};
addEmbeddedValuesRecursively(entity, document, metadata.embeddeds);
return hasData ? entity : null;
}
}
exports.DocumentToEntityTransformer = DocumentToEntityTransformer;
//# sourceMappingURL=DocumentToEntityTransformer.js.map