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{MysqlDriver} from \"../driver/mysql/MysqlDriver\";\nimport {ColumnMetadata} from \"../metadata/ColumnMetadata\";\nimport {Connection} from \"../connection/Connection\";\nimport {EntityMetadata} from \"../metadata/EntityMetadata\";\nimport {ForeignKeyMetadata} from \"../metadata/ForeignKeyMetadata\";\nimport {IndexMetadata} from \"../metadata/IndexMetadata\";\nimport {JoinTableMetadataArgs} from \"../metadata-args/JoinTableMetadataArgs\";\nimport {RelationMetadata} from \"../metadata/RelationMetadata\";\n\n/**\n * Creates EntityMetadata for junction tables.\n * Junction tables are tables generated by many-to-many relations.\n */\nexport class JunctionEntityMetadataBuilder {\n\n // -------------------------------------------------------------------------\n // Constructor\n // -------------------------------------------------------------------------\n\n constructor(private connection: Connection) {\n }\n\n // -------------------------------------------------------------------------\n // Public Methods\n // -------------------------------------------------------------------------\n\n /**\n * Builds EntityMetadata for the junction of the given many-to-many relation.\n */\n build(relation: RelationMetadata, joinTable: JoinTableMetadataArgs): EntityMetadata {\n const referencedColumns = this.collectReferencedColumns(relation, joinTable);\n const inverseReferencedColumns = this.collectInverseReferencedColumns(relation, joinTable);\n\n const joinTableName = joinTable.name || this.connection.namingStrategy.joinTableName(\n relation.entityMetadata.tableNameWithoutPrefix,\n relation.inverseEntityMetadata.tableNameWithoutPrefix,\n relation.propertyPath,\n relation.inverseRelation ? relation.inverseRelation.propertyName : \"\"\n );\n\n const entityMetadata = new EntityMetadata({\n connection: this.connection,\n args: {\n target: \"\",\n name: joinTableName,\n type: \"junction\",\n database: joinTable.database || relation.entityMetadata.database,\n schema: joinTable.schema || relation.entityMetadata.schema,\n }\n });\n entityMetadata.build();\n\n // create original side junction columns\n const junctionColumns = referencedColumns.map(referencedColumn => {\n const joinColumn = joinTable.joinColumns ? joinTable.joinColumns.find(joinColumnArgs => {\n return (!joinColumnArgs.referencedColumnName || joinColumnArgs.referencedColumnName === referencedColumn.propertyName) &&\n !!joinColumnArgs.name;\n }) : undefined;\n const columnName = joinColumn && joinColumn.name ? joinColumn.name\n : this.connection.namingStrategy.joinTableColumnName(relation.entityMetadata.tableNameWithoutPrefix, referencedColumn.propertyName, referencedColumn.databaseName);\n\n return new ColumnMetadata({\n connection: this.connection,\n entityMetadata: entityMetadata,\n referencedColumn: referencedColumn,\n args: {\n target: \"\",\n mode: \"virtual\",\n propertyName: columnName,\n options: {\n name: columnName,\n length: !referencedColumn.length\n && (this.connection.driver instanceof MysqlDriver)\n && (referencedColumn.generationStrategy === \"uuid\" || referencedColumn.type === \"uuid\")\n ? \"36\"\n : referencedColumn.length, // fix https://github.com/typeorm/typeorm/issues/3604\n width: referencedColumn.width,\n type: referencedColumn.type,\n precision: referencedColumn.precision,\n scale: referencedColumn.scale,\n charset: referencedColumn.charset,\n collation: referencedColumn.collation,\n zerofill: referencedColumn.zerofill,\n unsigned: referencedColumn.zerofill ? true : referencedColumn.unsigned,\n nullable: false,\n primary: true,\n }\n }\n });\n });\n\n // create inverse side junction columns\n const inverseJunctionColumns = inverseReferencedColumns.map(inverseReferencedColumn => {\n const joinColumn = joinTable.inverseJoinColumns ? joinTable.inverseJoinColumns.find(joinColumnArgs => {\n return (!joinColumnArgs.referencedColumnName || joinColumnArgs.referencedColumnName === inverseReferencedColumn.propertyName) &&\n !!joinColumnArgs.name;\n }) : undefined;\n const columnName = joinColumn && joinColumn.name ? joinColumn.name\n : this.connection.namingStrategy.joinTableInverseColumnName(relation.inverseEntityMetadata.tableNameWithoutPrefix, inverseReferencedColumn.propertyName, inverseReferencedColumn.databaseName);\n\n return new ColumnMetadata({\n connection: this.connection,\n entityMetadata: entityMetadata,\n referencedColumn: inverseReferencedColumn,\n args: {\n target: \"\",\n mode: \"virtual\",\n propertyName: columnName,\n options: {\n length: !inverseReferencedColumn.length\n && (this.connection.driver instanceof MysqlDriver)\n && (inverseReferencedColumn.generationStrategy === \"uuid\" || inverseReferencedColumn.type === \"uuid\")\n ? \"36\"\n : inverseReferencedColumn.length, // fix https://github.com/typeorm/typeorm/issues/3604\n type: inverseReferencedColumn.type,\n precision: inverseReferencedColumn.precision,\n scale: inverseReferencedColumn.scale,\n charset: inverseReferencedColumn.charset,\n collation: inverseReferencedColumn.collation,\n zerofill: inverseReferencedColumn.zerofill,\n unsigned: inverseReferencedColumn.zerofill ? true : inverseReferencedColumn.unsigned,\n name: columnName,\n nullable: false,\n primary: true,\n }\n }\n });\n });\n\n this.changeDuplicatedColumnNames(junctionColumns, inverseJunctionColumns);\n\n // set junction table columns\n entityMetadata.ownerColumns = junctionColumns;\n entityMetadata.inverseColumns = inverseJunctionColumns;\n entityMetadata.ownColumns = [...junctionColumns, ...inverseJunctionColumns];\n entityMetadata.ownColumns.forEach(column => column.relationMetadata = relation);\n\n // create junction table foreign keys\n entityMetadata.foreignKeys = [\n new ForeignKeyMetadata({\n entityMetadata: entityMetadata,\n referencedEntityMetadata: relation.entityMetadata,\n columns: junctionColumns,\n referencedColumns: referencedColumns,\n onDelete: relation.onDelete || \"CASCADE\"\n }),\n new ForeignKeyMetadata({\n entityMetadata: entityMetadata,\n referencedEntityMetadata: relation.inverseEntityMetadata,\n columns: inverseJunctionColumns,\n referencedColumns: inverseReferencedColumns,\n onDelete: relation.onDelete || \"CASCADE\"\n }),\n ];\n\n // create junction table indices\n entityMetadata.ownIndices = [\n new IndexMetadata({\n entityMetadata: entityMetadata,\n columns: junctionColumns,\n args: {\n target: entityMetadata.target,\n synchronize: true\n }\n }),\n\n new IndexMetadata({\n entityMetadata: entityMetadata,\n columns: inverseJunctionColumns,\n args: {\n target: entityMetadata.target,\n synchronize: true\n }\n })\n ];\n\n // finally return entity metadata\n return entityMetadata;\n }\n\n // -------------------------------------------------------------------------\n // Protected Methods\n // -------------------------------------------------------------------------\n\n /**\n * Collects referenced columns from the given join column args.\n */\n protected collectReferencedColumns(relation: RelationMetadata, joinTable: JoinTableMetadataArgs): ColumnMetadata[] {\n const hasAnyReferencedColumnName = joinTable.joinColumns ? joinTable.joinColumns.find(joinColumn => !!joinColumn.referencedColumnName) : false;\n if (!joinTable.joinColumns || (joinTable.joinColumns && !hasAnyReferencedColumnName)) {\n return relation.entityMetadata.columns.filter(column => column.isPrimary);\n } else {\n return joinTable.joinColumns.map(joinColumn => {\n const referencedColumn = relation.entityMetadata.columns.find(column => column.propertyName === joinColumn.referencedColumnName);\n if (!referencedColumn)\n throw new Error(`Referenced column ${joinColumn.referencedColumnName} was not found in entity ${relation.entityMetadata.name}`);\n\n return referencedColumn;\n });\n }\n }\n\n /**\n * Collects inverse referenced columns from the given join column args.\n */\n protected collectInverseReferencedColumns(relation: RelationMetadata, joinTable: JoinTableMetadataArgs): ColumnMetadata[] {\n const hasInverseJoinColumns = !!joinTable.inverseJoinColumns;\n const hasAnyInverseReferencedColumnName = hasInverseJoinColumns ? joinTable.inverseJoinColumns!.find(joinColumn => !!joinColumn.referencedColumnName) : false;\n if (!hasInverseJoinColumns || (hasInverseJoinColumns && !hasAnyInverseReferencedColumnName)) {\n return relation.inverseEntityMetadata.primaryColumns;\n } else {\n return joinTable.inverseJoinColumns!.map(joinColumn => {\n const referencedColumn = relation.inverseEntityMetadata.ownColumns.find(column => column.propertyName === joinColumn.referencedColumnName);\n if (!referencedColumn)\n throw new Error(`Referenced column ${joinColumn.referencedColumnName} was not found in entity ${relation.inverseEntityMetadata.name}`);\n\n return referencedColumn;\n });\n }\n }\n\n protected changeDuplicatedColumnNames(junctionColumns: ColumnMetadata[], inverseJunctionColumns: ColumnMetadata[]) {\n junctionColumns.forEach(junctionColumn => {\n inverseJunctionColumns.forEach(inverseJunctionColumn => {\n if (junctionColumn.givenDatabaseName === inverseJunctionColumn.givenDatabaseName) {\n const junctionColumnName = this.connection.namingStrategy.joinTableColumnDuplicationPrefix(junctionColumn.propertyName, 1);\n junctionColumn.propertyName = junctionColumnName;\n junctionColumn.givenDatabaseName = junctionColumnName;\n\n const inverseJunctionColumnName = this.connection.namingStrategy.joinTableColumnDuplicationPrefix(inverseJunctionColumn.propertyName, 2);\n inverseJunctionColumn.propertyName = inverseJunctionColumnName;\n inverseJunctionColumn.givenDatabaseName = inverseJunctionColumnName;\n }\n });\n });\n }\n\n}\n"],"sourceRoot":".."}
|
