| 1 | 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{RelationType} from \"./types/RelationTypes\";\nimport {EntityMetadata} from \"./EntityMetadata\";\nimport {ForeignKeyMetadata} from \"./ForeignKeyMetadata\";\nimport {ObjectLiteral} from \"../common/ObjectLiteral\";\nimport {ColumnMetadata} from \"./ColumnMetadata\";\nimport {EmbeddedMetadata} from \"./EmbeddedMetadata\";\nimport {RelationMetadataArgs} from \"../metadata-args/RelationMetadataArgs\";\nimport {DeferrableType} from \"./types/DeferrableType\";\nimport {OnUpdateType} from \"./types/OnUpdateType\";\nimport {OnDeleteType} from \"./types/OnDeleteType\";\nimport {PropertyTypeFactory} from \"./types/PropertyTypeInFunction\";\n\n/**\n * Contains all information about some entity's relation.\n */\nexport class RelationMetadata {\n\n // ---------------------------------------------------------------------\n // Public Properties\n // ---------------------------------------------------------------------\n\n /**\n * Entity metadata of the entity where this relation is placed.\n *\n * For example for @ManyToMany(type => Category) in Post, entityMetadata will be metadata of Post entity.\n */\n entityMetadata: EntityMetadata;\n\n /**\n * Entity metadata of the entity that is targeted by this relation.\n *\n * For example for @ManyToMany(type => Category) in Post, inverseEntityMetadata will be metadata of Category entity.\n */\n inverseEntityMetadata: EntityMetadata;\n\n /**\n * Entity metadata of the junction table.\n * Junction tables have their own entity metadata objects.\n * Defined only for many-to-many relations.\n */\n junctionEntityMetadata?: EntityMetadata;\n\n /**\n * Embedded metadata where this relation is.\n * If this relation is not in embed then this property value is undefined.\n */\n embeddedMetadata?: EmbeddedMetadata;\n\n /**\n * Relation type, e.g. is it one-to-one, one-to-many, many-to-one or many-to-many.\n */\n relationType: RelationType;\n\n /**\n * Target entity to which this relation is applied.\n * Target IS NOT equal to entityMetadata.target, because relation\n *\n * For example for @ManyToMany(type => Category) in Post, target will be Post.\n * If @ManyToMany(type => Category) is in Counters which is embedded into Post, target will be Counters.\n * If @ManyToMany(type => Category) is in abstract class BaseUser which Post extends, target will be BaseUser.\n * Target can be string if its defined in entity schema instead of class.\n */\n target: Function|string;\n\n /**\n * Target's property name to which relation decorator is applied.\n */\n propertyName: string;\n\n /**\n * Gets full path to this column property (including relation name).\n * Full path is relevant when column is used in embeds (one or multiple nested).\n * For example it will return \"counters.subcounters.likes\".\n * If property is not in embeds then it returns just property name of the column.\n */\n propertyPath: string;\n\n /**\n * Indicates if this is a parent (can be only many-to-one relation) relation in the tree tables.\n */\n isTreeParent: boolean = false;\n\n /**\n * Indicates if this is a children (can be only one-to-many relation) relation in the tree tables.\n */\n isTreeChildren: boolean = false;\n\n /**\n * Indicates if this relation's column is a primary key.\n * Can be used only for many-to-one and owner one-to-one relations.\n */\n isPrimary: boolean = false;\n\n /**\n * Indicates if this relation is lazily loaded.\n */\n isLazy: boolean = false;\n\n /**\n * Indicates if this relation is eagerly loaded.\n */\n isEager: boolean = false;\n\n /**\n * Indicates if persistence is enabled for the relation.\n * By default its enabled, but if you want to avoid any changes in the relation to be reflected in the database you can disable it.\n * If its disabled you can only change a relation from inverse side of a relation or using relation query builder functionality.\n * This is useful for performance optimization since its disabling avoid multiple extra queries during entity save.\n */\n persistenceEnabled: boolean = true;\n\n /**\n * If set to true then related objects are allowed to be inserted to the database.\n */\n isCascadeInsert: boolean = false;\n\n /**\n * If set to true then related objects are allowed to be updated in the database.\n */\n isCascadeUpdate: boolean = false;\n\n /**\n * If set to true then related objects are allowed to be remove from the database.\n */\n isCascadeRemove: boolean = false;\n\n /**\n * Indicates if relation column value can be nullable or not.\n */\n isNullable: boolean = true;\n\n /**\n * What to do with a relation on deletion of the row containing a foreign key.\n */\n onDelete?: OnDeleteType;\n\n /**\n * What to do with a relation on update of the row containing a foreign key.\n */\n onUpdate?: OnUpdateType;\n\n /**\n * What to do with a relation on update of the row containing a foreign key.\n */\n deferrable?: DeferrableType;\n\n /**\n * Gets the property's type to which this relation is applied.\n *\n * For example for @ManyToMany(type => Category) in Post, target will be Category.\n */\n type: Function|string;\n\n /**\n * Indicates if this side is an owner of this relation.\n */\n isOwning: boolean = false;\n\n /**\n * Checks if this relation's type is \"one-to-one\".\n */\n isOneToOne: boolean = false;\n\n /**\n * Checks if this relation is owner side of the \"one-to-one\" relation.\n * Owner side means this side of relation has a join column in the table.\n */\n isOneToOneOwner: boolean = false;\n\n /**\n * Checks if this relation has a join column (e.g. is it many-to-one or one-to-one owner side).\n */\n isWithJoinColumn: boolean = false;\n\n /**\n * Checks if this relation is NOT owner side of the \"one-to-one\" relation.\n * NOT owner side means this side of relation does not have a join column in the table.\n */\n isOneToOneNotOwner: boolean = false;\n\n /**\n * Checks if this relation's type is \"one-to-many\".\n */\n isOneToMany: boolean = false;\n\n /**\n * Checks if this relation's type is \"many-to-one\".\n */\n isManyToOne: boolean = false;\n\n /**\n * Checks if this relation's type is \"many-to-many\".\n */\n isManyToMany: boolean = false;\n\n /**\n * Checks if this relation's type is \"many-to-many\", and is owner side of the relationship.\n * Owner side means this side of relation has a join table.\n */\n isManyToManyOwner: boolean = false;\n\n /**\n * Checks if this relation's type is \"many-to-many\", and is NOT owner side of the relationship.\n * Not owner side means this side of relation does not have a join table.\n */\n isManyToManyNotOwner: boolean = false;\n\n /**\n * Gets the property path of the inverse side of the relation.\n */\n inverseSidePropertyPath: string;\n\n /**\n * Inverse side of the relation set by user.\n *\n * Inverse side set in the relation can be either string - property name of the column on inverse side,\n * either can be a function that accepts a map of properties with the object and returns one of them.\n * Second approach is used to achieve type-safety.\n */\n givenInverseSidePropertyFactory: PropertyTypeFactory<any>;\n\n /**\n * Gets the relation metadata of the inverse side of this relation.\n */\n inverseRelation?: RelationMetadata;\n\n /**\n * Join table name.\n */\n joinTableName: string;\n\n /**\n * Foreign keys created for this relation.\n */\n foreignKeys: ForeignKeyMetadata[] = [];\n\n /**\n * Join table columns.\n * Join columns can be obtained only from owner side of the relation.\n * From non-owner side of the relation join columns will be empty.\n * If this relation is a many-to-one/one-to-one then it takes join columns from the current entity.\n * If this relation is many-to-many then it takes all owner join columns from the junction entity.\n */\n joinColumns: ColumnMetadata[] = [];\n\n /**\n * Inverse join table columns.\n * Inverse join columns are supported only for many-to-many relations\n * and can be obtained only from owner side of the relation.\n * From non-owner side of the relation join columns will be undefined.\n */\n inverseJoinColumns: ColumnMetadata[] = [];\n\n // ---------------------------------------------------------------------\n // Constructor\n // ---------------------------------------------------------------------\n\n constructor(options: {\n entityMetadata: EntityMetadata,\n embeddedMetadata?: EmbeddedMetadata,\n args: RelationMetadataArgs\n }) {\n this.entityMetadata = options.entityMetadata;\n this.embeddedMetadata = options.embeddedMetadata!;\n const args = options.args;\n this.target = args.target;\n this.propertyName = args.propertyName;\n this.relationType = args.relationType;\n\n if (args.inverseSideProperty)\n this.givenInverseSidePropertyFactory = args.inverseSideProperty;\n\n this.isLazy = args.isLazy || false;\n this.isCascadeInsert = args.options.cascade === true || (args.options.cascade instanceof Array && args.options.cascade.indexOf(\"insert\") !== -1);\n this.isCascadeUpdate = args.options.cascade === true || (args.options.cascade instanceof Array && args.options.cascade.indexOf(\"update\") !== -1);\n this.isCascadeRemove = args.options.cascade === true || (args.options.cascade instanceof Array && args.options.cascade.indexOf(\"remove\") !== -1);\n this.isPrimary = args.options.primary || false;\n this.isNullable = args.options.nullable === false || this.isPrimary ? false : true;\n this.onDelete = args.options.onDelete;\n this.onUpdate = args.options.onUpdate;\n this.deferrable = args.options.deferrable;\n this.isEager = args.options.eager || false;\n this.persistenceEnabled = args.options.persistence === false ? false : true;\n this.isTreeParent = args.isTreeParent || false;\n this.isTreeChildren = args.isTreeChildren || false;\n this.type = args.type instanceof Function ? (args.type as () => any)() : args.type;\n\n this.isOneToOne = this.relationType === \"one-to-one\";\n this.isOneToMany = this.relationType === \"one-to-many\";\n this.isManyToOne = this.relationType === \"many-to-one\";\n this.isManyToMany = this.relationType === \"many-to-many\";\n this.isOneToOneNotOwner = this.isOneToOne ? true : false;\n this.isManyToManyNotOwner = this.isManyToMany ? true : false;\n }\n\n // ---------------------------------------------------------------------\n // Public Methods\n // ---------------------------------------------------------------------\n\n /**\n * Creates join column ids map from the given related entity ids array.\n */\n getRelationIdMap(entity: ObjectLiteral): ObjectLiteral|undefined {\n const joinColumns = this.isOwning ? this.joinColumns : this.inverseRelation!.joinColumns;\n const referencedColumns = joinColumns.map(joinColumn => joinColumn.referencedColumn!);\n // console.log(\"entity\", entity);\n // console.log(\"referencedColumns\", referencedColumns);\n return EntityMetadata.getValueMap(entity, referencedColumns);\n }\n\n /**\n * Ensures that given object is an entity id map.\n * If given id is an object then it means its already id map.\n * If given id isn't an object then it means its a value of the id column\n * and it creates a new id map with this value and name of the primary column.\n */\n ensureRelationIdMap(id: any): ObjectLiteral {\n if (id instanceof Object)\n return id;\n\n const joinColumns = this.isOwning ? this.joinColumns : this.inverseRelation!.joinColumns;\n const referencedColumns = joinColumns.map(joinColumn => joinColumn.referencedColumn!);\n\n if (referencedColumns.length > 1)\n throw new Error(`Cannot create relation id map for a single value because relation contains multiple referenced columns.`);\n\n return referencedColumns[0].createValueMap(id);\n }\n\n /**\n * Extracts column value from the given entity.\n * If column is in embedded (or recursive embedded) it extracts its value from there.\n */\n getEntityValue(entity: ObjectLiteral, getLazyRelationsPromiseValue: boolean = false): any|undefined {\n if (entity === null || entity === undefined) return undefined;\n // extract column value from embeddeds of entity if column is in embedded\n if (this.embeddedMetadata) {\n\n // example: post[data][information][counters].id where \"data\", \"information\" and \"counters\" are embeddeds\n // we need to get value of \"id\" column from the post real entity object\n\n // first step - we extract all parent properties of the entity relative to this column, e.g. [data, information, counters]\n const propertyNames = [...this.embeddedMetadata.parentPropertyNames];\n\n // next we need to access post[data][information][counters][this.propertyName] to get column value from the counters\n // this recursive function takes array of generated property names and gets the post[data][information][counters] embed\n const extractEmbeddedColumnValue = (propertyNames: string[], value: ObjectLiteral): any => {\n const propertyName = propertyNames.shift();\n if (propertyName) {\n if (value[propertyName]) {\n return extractEmbeddedColumnValue(propertyNames, value[propertyName]);\n }\n return undefined;\n }\n return value;\n };\n\n // once we get nested embed object we get its column, e.g. post[data][information][counters][this.propertyName]\n const embeddedObject = extractEmbeddedColumnValue(propertyNames, entity);\n\n if (this.isLazy) {\n if (embeddedObject[\"__\" + this.propertyName + \"__\"] !== undefined)\n return embeddedObject[\"__\" + this.propertyName + \"__\"];\n\n if (getLazyRelationsPromiseValue === true)\n return embeddedObject[this.propertyName];\n\n return undefined;\n }\n return embeddedObject ? embeddedObject[this.isLazy ? \"__\" + this.propertyName + \"__\" : this.propertyName] : undefined;\n\n } else { // no embeds - no problems. Simply return column name by property name of the entity\n if (this.isLazy) {\n if (entity[\"__\" + this.propertyName + \"__\"] !== undefined)\n return entity[\"__\" + this.propertyName + \"__\"];\n\n if (getLazyRelationsPromiseValue === true)\n return entity[this.propertyName];\n\n return undefined;\n }\n return entity[this.propertyName];\n }\n }\n\n /**\n * Sets given entity's relation's value.\n * Using of this method helps to set entity relation's value of the lazy and non-lazy relations.\n *\n * If merge is set to true, it merges given value into currently\n */\n setEntityValue(entity: ObjectLiteral, value: any): void {\n const propertyName = this.isLazy ? \"__\" + this.propertyName + \"__\" : this.propertyName;\n\n if (this.embeddedMetadata) {\n\n // first step - we extract all parent properties of the entity relative to this column, e.g. [data, information, counters]\n const extractEmbeddedColumnValue = (embeddedMetadatas: EmbeddedMetadata[], map: ObjectLiteral): any => {\n // if (!object[embeddedMetadata.propertyName])\n // object[embeddedMetadata.propertyName] = embeddedMetadata.create();\n\n const embeddedMetadata = embeddedMetadatas.shift();\n if (embeddedMetadata) {\n if (!map[embeddedMetadata.propertyName])\n map[embeddedMetadata.propertyName] = embeddedMetadata.create();\n\n extractEmbeddedColumnValue(embeddedMetadatas, map[embeddedMetadata.propertyName]);\n return map;\n }\n map[propertyName] = value;\n return map;\n };\n return extractEmbeddedColumnValue([...this.embeddedMetadata.embeddedMetadataTree], entity);\n\n } else {\n entity[propertyName] = value;\n }\n }\n\n /**\n * Creates entity id map from the given entity ids array.\n */\n createValueMap(value: any) {\n\n // extract column value from embeds of entity if column is in embedded\n if (this.embeddedMetadata) {\n\n // example: post[data][information][counters].id where \"data\", \"information\" and \"counters\" are embeddeds\n // we need to get value of \"id\" column from the post real entity object and return it in a\n // { data: { information: { counters: { id: ... } } } } format\n\n // first step - we extract all parent properties of the entity relative to this column, e.g. [data, information, counters]\n const propertyNames = [...this.embeddedMetadata.parentPropertyNames];\n\n // now need to access post[data][information][counters] to get column value from the counters\n // and on each step we need to create complex literal object, e.g. first { data },\n // then { data: { information } }, then { data: { information: { counters } } },\n // then { data: { information: { counters: [this.propertyName]: entity[data][information][counters][this.propertyName] } } }\n // this recursive function helps doing that\n const extractEmbeddedColumnValue = (propertyNames: string[], map: ObjectLiteral): any => {\n const propertyName = propertyNames.shift();\n if (propertyName) {\n map[propertyName] = {};\n extractEmbeddedColumnValue(propertyNames, map[propertyName]);\n return map;\n }\n map[this.propertyName] = value;\n return map;\n };\n return extractEmbeddedColumnValue(propertyNames, {});\n\n } else { // no embeds - no problems. Simply return column property name and its value of the entity\n return { [this.propertyName]: value };\n }\n }\n\n // ---------------------------------------------------------------------\n // Builder Methods\n // ---------------------------------------------------------------------\n\n /**\n * Builds some depend relation metadata properties.\n * This builder method should be used only after embedded metadata tree was build.\n */\n build() {\n this.propertyPath = this.buildPropertyPath();\n }\n\n /**\n * Registers given foreign keys in the relation.\n * This builder method should be used to register foreign key in the relation.\n */\n registerForeignKeys(...foreignKeys: ForeignKeyMetadata[]) {\n this.foreignKeys.push(...foreignKeys);\n this.joinColumns = this.foreignKeys[0] ? this.foreignKeys[0].columns : [];\n this.inverseJoinColumns = this.foreignKeys[1] ? this.foreignKeys[1].columns : [];\n this.isOwning = this.isManyToOne || ((this.isManyToMany || this.isOneToOne) && this.joinColumns.length > 0);\n this.isOneToOneOwner = this.isOneToOne && this.isOwning;\n this.isOneToOneNotOwner = this.isOneToOne && !this.isOwning;\n this.isManyToManyOwner = this.isManyToMany && this.isOwning;\n this.isManyToManyNotOwner = this.isManyToMany && !this.isOwning;\n this.isWithJoinColumn = this.isManyToOne || this.isOneToOneOwner;\n }\n\n /**\n * Registers a given junction entity metadata.\n * This builder method can be called after junction entity metadata for the many-to-many relation was created.\n */\n registerJunctionEntityMetadata(junctionEntityMetadata: EntityMetadata) {\n this.junctionEntityMetadata = junctionEntityMetadata;\n this.joinTableName = junctionEntityMetadata.tableName;\n if (this.inverseRelation) {\n this.inverseRelation.junctionEntityMetadata = junctionEntityMetadata;\n this.joinTableName = junctionEntityMetadata.tableName;\n }\n }\n\n /**\n * Builds inverse side property path based on given inverse side property factory.\n * This builder method should be used only after properties map of the inverse entity metadata was build.\n */\n buildInverseSidePropertyPath(): string {\n\n if (this.givenInverseSidePropertyFactory) {\n const ownerEntityPropertiesMap = this.inverseEntityMetadata.propertiesMap;\n if (typeof this.givenInverseSidePropertyFactory === \"function\")\n return this.givenInverseSidePropertyFactory(ownerEntityPropertiesMap);\n\n if (typeof this.givenInverseSidePropertyFactory === \"string\")\n return this.givenInverseSidePropertyFactory;\n\n } else if (this.isTreeParent && this.entityMetadata.treeChildrenRelation) {\n return this.entityMetadata.treeChildrenRelation.propertyName;\n\n } else if (this.isTreeChildren && this.entityMetadata.treeParentRelation) {\n return this.entityMetadata.treeParentRelation.propertyName;\n }\n\n return \"\";\n }\n\n /**\n * Builds relation's property path based on its embedded tree.\n */\n buildPropertyPath(): string {\n if (!this.embeddedMetadata || !this.embeddedMetadata.parentPropertyNames.length)\n return this.propertyName;\n\n return this.embeddedMetadata.parentPropertyNames.join(\".\") + \".\" + this.propertyName;\n }\n\n}\n"],"sourceRoot":".."} |