typeorm
Version:
Data-Mapper ORM for TypeScript and ES2021+. Supports MySQL/MariaDB, PostgreSQL, MS SQL Server, Oracle, SAP HANA, SQLite, MongoDB databases.
56 lines (54 loc) • 2.96 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.RelationIdMetadataToAttributeTransformer = void 0;
const RelationIdAttribute_1 = require("./RelationIdAttribute");
class RelationIdMetadataToAttributeTransformer {
// -------------------------------------------------------------------------
// Constructor
// -------------------------------------------------------------------------
constructor(expressionMap) {
this.expressionMap = expressionMap;
}
// -------------------------------------------------------------------------
// Public Methods
// -------------------------------------------------------------------------
transform() {
// by example:
// post has relation id:
// @RelationId(post => post.categories) categoryIds
// category has relation id
// @RelationId(category => category.images) imageIds
// we load post and join category
// we expect post.categoryIds and post.category.imageIds to have relation ids
// first create relation id attributes for all relation id metadatas of the main selected object (post from example)
if (this.expressionMap.mainAlias) {
this.expressionMap.mainAlias.metadata.relationIds.forEach((relationId) => {
const attribute = this.metadataToAttribute(this.expressionMap.mainAlias.name, relationId);
this.expressionMap.relationIdAttributes.push(attribute);
});
}
// second create relation id attributes for all relation id metadatas of all joined objects (category from example)
this.expressionMap.joinAttributes.forEach((join) => {
// ensure this join has a metadata, because relation id can only work for real orm entities
if (!join.metadata || join.metadata.isJunction)
return;
join.metadata.relationIds.forEach((relationId) => {
const attribute = this.metadataToAttribute(join.alias.name, relationId);
this.expressionMap.relationIdAttributes.push(attribute);
});
});
}
// -------------------------------------------------------------------------
// Private Methods
// -------------------------------------------------------------------------
metadataToAttribute(parentAliasName, relationId) {
return new RelationIdAttribute_1.RelationIdAttribute(this.expressionMap, {
relationName: parentAliasName + "." + relationId.relation.propertyName, // category.images
mapToProperty: parentAliasName + "." + relationId.propertyName, // category.imageIds
alias: relationId.alias,
queryBuilderFactory: relationId.queryBuilderFactory,
});
}
}
exports.RelationIdMetadataToAttributeTransformer = RelationIdMetadataToAttributeTransformer;
//# sourceMappingURL=RelationIdMetadataToAttributeTransformer.js.map