| 1 | 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{FindManyOptions} from \"./FindManyOptions\";\nimport {FindOneOptions} from \"./FindOneOptions\";\nimport {SelectQueryBuilder} from \"../query-builder/SelectQueryBuilder\";\nimport {FindRelationsNotFoundError} from \"../error/FindRelationsNotFoundError\";\nimport {EntityMetadata} from \"../metadata/EntityMetadata\";\nimport {shorten} from \"../util/StringUtils\";\n\n/**\n * Utilities to work with FindOptions.\n */\nexport class FindOptionsUtils {\n\n // -------------------------------------------------------------------------\n // Public Static Methods\n // -------------------------------------------------------------------------\n\n /**\n * Checks if given object is really instance of FindOneOptions interface.\n */\n static isFindOneOptions(obj: any): obj is FindOneOptions<any> {\n const possibleOptions: FindOneOptions<any> = obj;\n return possibleOptions &&\n (\n possibleOptions.select instanceof Array ||\n possibleOptions.where instanceof Object ||\n typeof possibleOptions.where === \"string\" ||\n possibleOptions.relations instanceof Array ||\n possibleOptions.join instanceof Object ||\n possibleOptions.order instanceof Object ||\n possibleOptions.cache instanceof Object ||\n typeof possibleOptions.cache === \"boolean\" ||\n typeof possibleOptions.cache === \"number\" ||\n possibleOptions.lock instanceof Object ||\n possibleOptions.loadRelationIds instanceof Object ||\n typeof possibleOptions.loadRelationIds === \"boolean\" ||\n typeof possibleOptions.loadEagerRelations === \"boolean\"\n );\n }\n\n /**\n * Checks if given object is really instance of FindManyOptions interface.\n */\n static isFindManyOptions(obj: any): obj is FindManyOptions<any> {\n const possibleOptions: FindManyOptions<any> = obj;\n return possibleOptions && (\n this.isFindOneOptions(possibleOptions) ||\n typeof (possibleOptions as FindManyOptions<any>).skip === \"number\" ||\n typeof (possibleOptions as FindManyOptions<any>).take === \"number\" ||\n typeof (possibleOptions as FindManyOptions<any>).skip === \"string\" ||\n typeof (possibleOptions as FindManyOptions<any>).take === \"string\"\n );\n }\n\n /**\n * Checks if given object is really instance of FindOptions interface.\n */\n static extractFindManyOptionsAlias(object: any): string|undefined {\n if (this.isFindManyOptions(object) && object.join)\n return object.join.alias;\n\n return undefined;\n }\n\n /**\n * Applies give find many options to the given query builder.\n */\n static applyFindManyOptionsOrConditionsToQueryBuilder<T>(qb: SelectQueryBuilder<T>, options: FindManyOptions<T>|Partial<T>|undefined): SelectQueryBuilder<T> {\n if (this.isFindManyOptions(options))\n return this.applyOptionsToQueryBuilder(qb, options);\n\n if (options)\n return qb.where(options);\n\n return qb;\n }\n\n /**\n * Applies give find options to the given query builder.\n */\n static applyOptionsToQueryBuilder<T>(qb: SelectQueryBuilder<T>, options: FindOneOptions<T>|FindManyOptions<T>|undefined): SelectQueryBuilder<T> {\n\n // if options are not set then simply return query builder. This is made for simplicity of usage.\n if (!options || (!this.isFindOneOptions(options) && !this.isFindManyOptions(options)))\n return qb;\n\n if (!qb.expressionMap.mainAlias || !qb.expressionMap.mainAlias.hasMetadata)\n return qb;\n\n const metadata = qb.expressionMap.mainAlias!.metadata;\n\n // apply all options from FindOptions\n if (options.select) {\n qb.select([]);\n options.select.forEach(select => {\n if (!metadata.findColumnWithPropertyPath(String(select)))\n throw new Error(`${select} column was not found in the ${metadata.name} entity.`);\n\n qb.addSelect(qb.alias + \".\" + select);\n });\n }\n\n if (options.where)\n qb.where(options.where);\n\n if ((options as FindManyOptions<T>).skip)\n qb.skip((options as FindManyOptions<T>).skip!);\n\n if ((options as FindManyOptions<T>).take)\n qb.take((options as FindManyOptions<T>).take!);\n\n if (options.order)\n Object.keys(options.order).forEach(key => {\n const order = ((options as FindOneOptions<T>).order as any)[key as any];\n\n if (!metadata.findColumnWithPropertyPath(key))\n throw new Error(`${key} column was not found in the ${metadata.name} entity.`);\n\n switch (order) {\n case 1:\n qb.addOrderBy(qb.alias + \".\" + key, \"ASC\");\n break;\n case -1:\n qb.addOrderBy(qb.alias + \".\" + key, \"DESC\");\n break;\n case \"ASC\":\n qb.addOrderBy(qb.alias + \".\" + key, \"ASC\");\n break;\n case \"DESC\":\n qb.addOrderBy(qb.alias + \".\" + key, \"DESC\");\n break;\n }\n });\n\n if (options.relations) {\n const allRelations = options.relations.map(relation => relation);\n this.applyRelationsRecursively(qb, allRelations, qb.expressionMap.mainAlias!.name, qb.expressionMap.mainAlias!.metadata, \"\");\n // recursive removes found relations from allRelations array\n // if there are relations left in this array it means those relations were not found in the entity structure\n // so, we give an exception about not found relations\n if (allRelations.length > 0)\n throw new FindRelationsNotFoundError(allRelations);\n }\n\n if (options.join) {\n if (options.join.leftJoin)\n Object.keys(options.join.leftJoin).forEach(key => {\n qb.leftJoin(options.join!.leftJoin![key], key);\n });\n\n if (options.join.innerJoin)\n Object.keys(options.join.innerJoin).forEach(key => {\n qb.innerJoin(options.join!.innerJoin![key], key);\n });\n\n if (options.join.leftJoinAndSelect)\n Object.keys(options.join.leftJoinAndSelect).forEach(key => {\n qb.leftJoinAndSelect(options.join!.leftJoinAndSelect![key], key);\n });\n\n if (options.join.innerJoinAndSelect)\n Object.keys(options.join.innerJoinAndSelect).forEach(key => {\n qb.innerJoinAndSelect(options.join!.innerJoinAndSelect![key], key);\n });\n }\n\n if (options.cache) {\n if (options.cache instanceof Object) {\n const cache = options.cache as { id: any, milliseconds: number };\n qb.cache(cache.id, cache.milliseconds);\n } else {\n qb.cache(options.cache);\n }\n }\n\n if (options.lock) {\n if (options.lock.mode === \"optimistic\") {\n qb.setLock(options.lock.mode, options.lock.version as any);\n } else if (options.lock.mode === \"pessimistic_read\" || options.lock.mode === \"pessimistic_write\" || options.lock.mode === \"dirty_read\") {\n qb.setLock(options.lock.mode);\n }\n }\n\n if (options.loadRelationIds === true) {\n qb.loadAllRelationIds();\n\n } else if (options.loadRelationIds instanceof Object) {\n qb.loadAllRelationIds(options.loadRelationIds as any);\n }\n\n return qb;\n }\n\n // -------------------------------------------------------------------------\n // Protected Static Methods\n // -------------------------------------------------------------------------\n\n /**\n * Adds joins for all relations and sub-relations of the given relations provided in the find options.\n */\n protected static applyRelationsRecursively(qb: SelectQueryBuilder<any>, allRelations: string[], alias: string, metadata: EntityMetadata, prefix: string): void {\n\n // find all relations that match given prefix\n let matchedBaseRelations: string[] = [];\n if (prefix) {\n const regexp = new RegExp(\"^\" + prefix.replace(\".\", \"\\\\.\") + \"\\\\.\");\n matchedBaseRelations = allRelations\n .filter(relation => relation.match(regexp))\n .map(relation => relation.replace(regexp, \"\"))\n .filter(relation => metadata.findRelationWithPropertyPath(relation));\n } else {\n matchedBaseRelations = allRelations.filter(relation => metadata.findRelationWithPropertyPath(relation));\n }\n\n // go through all matched relations and add join for them\n matchedBaseRelations.forEach(relation => {\n\n // generate a relation alias\n let relationAlias: string = alias + \"__\" + relation;\n // shorten it if needed by the driver\n if (qb.connection.driver.maxAliasLength && relationAlias.length > qb.connection.driver.maxAliasLength) {\n relationAlias = shorten(relationAlias);\n }\n\n // add a join for the found relation\n const selection = alias + \".\" + relation;\n qb.leftJoinAndSelect(selection, relationAlias);\n\n // join the eager relations of the found relation\n const relMetadata = metadata.relations.find(metadata => metadata.propertyName === relation);\n if (relMetadata) {\n this.joinEagerRelations(qb, relationAlias, relMetadata.inverseEntityMetadata);\n }\n\n // remove added relations from the allRelations array, this is needed to find all not found relations at the end\n allRelations.splice(allRelations.indexOf(prefix ? prefix + \".\" + relation : relation), 1);\n\n // try to find sub-relations\n const join = qb.expressionMap.joinAttributes.find(join => join.entityOrProperty === selection);\n this.applyRelationsRecursively(qb, allRelations, join!.alias.name, join!.metadata!, prefix ? prefix + \".\" + relation : relation);\n });\n }\n\n public static joinEagerRelations(qb: SelectQueryBuilder<any>, alias: string, metadata: EntityMetadata) {\n metadata.eagerRelations.forEach(relation => {\n const relationAlias = qb.connection.namingStrategy.eagerJoinRelationAlias(alias, relation.propertyPath);\n qb.leftJoinAndSelect(alias + \".\" + relation.propertyPath, relationAlias);\n this.joinEagerRelations(qb, relationAlias, relation.inverseEntityMetadata);\n });\n }\n\n}\n"],"sourceRoot":".."} |