typeorm
Version:
Data-Mapper ORM for TypeScript and ES2021+. Supports MySQL/MariaDB, PostgreSQL, MS SQL Server, Oracle, SAP HANA, SQLite, MongoDB databases.
85 lines (83 loc) • 3.78 kB
JavaScript
import { QueryBuilderUtils } from "../QueryBuilderUtils";
import { ObjectUtils } from "../../util/ObjectUtils";
import { TypeORMError } from "../../error/TypeORMError";
/**
* Stores all join relation id attributes which will be used to build a JOIN query.
*/
export class RelationIdAttribute {
// -------------------------------------------------------------------------
// Constructor
// -------------------------------------------------------------------------
constructor(queryExpressionMap, relationIdAttribute) {
this.queryExpressionMap = queryExpressionMap;
/**
* Indicates if relation id should NOT be loaded as id map.
*/
this.disableMixedMap = false;
ObjectUtils.assign(this, relationIdAttribute || {});
}
// -------------------------------------------------------------------------
// Public Methods
// -------------------------------------------------------------------------
get joinInverseSideMetadata() {
return this.relation.inverseEntityMetadata;
}
/**
* Alias of the parent of this join.
* For example, if we join ("post.category", "categoryAlias") then "post" is a parent alias.
* This value is extracted from entityOrProperty value.
* This is available when join was made using "post.category" syntax.
*/
get parentAlias() {
if (!QueryBuilderUtils.isAliasProperty(this.relationName))
throw new TypeORMError(`Given value must be a string representation of alias property`);
return this.relationName.substr(0, this.relationName.indexOf("."));
}
/**
* Relation property name of the parent.
* This is used to understand what is joined.
* For example, if we join ("post.category", "categoryAlias") then "category" is a relation property.
* This value is extracted from entityOrProperty value.
* This is available when join was made using "post.category" syntax.
*/
get relationPropertyPath() {
if (!QueryBuilderUtils.isAliasProperty(this.relationName))
throw new TypeORMError(`Given value must be a string representation of alias property`);
return this.relationName.substr(this.relationName.indexOf(".") + 1);
}
/**
* Relation of the parent.
* This is used to understand what is joined.
* This is available when join was made using "post.category" syntax.
*/
get relation() {
if (!QueryBuilderUtils.isAliasProperty(this.relationName))
throw new TypeORMError(`Given value must be a string representation of alias property`);
const relationOwnerSelection = this.queryExpressionMap.findAliasByName(this.parentAlias);
const relation = relationOwnerSelection.metadata.findRelationWithPropertyPath(this.relationPropertyPath);
if (!relation)
throw new TypeORMError(`Relation with property path ${this.relationPropertyPath} in entity was not found.`);
return relation;
}
/**
* Generates alias of junction table, whose ids we get.
*/
get junctionAlias() {
const [parentAlias, relationProperty] = this.relationName.split(".");
return parentAlias + "_" + relationProperty + "_rid";
}
/**
* Metadata of the joined entity.
* If extra condition without entity was joined, then it will return undefined.
*/
get junctionMetadata() {
return this.relation.junctionEntityMetadata;
}
get mapToPropertyParentAlias() {
return this.mapToProperty.substr(0, this.mapToProperty.indexOf("."));
}
get mapToPropertyPropertyPath() {
return this.mapToProperty.substr(this.mapToProperty.indexOf(".") + 1);
}
}
//# sourceMappingURL=RelationIdAttribute.js.map