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{EntityMetadata} from \"../metadata/EntityMetadata\";\nimport {ColumnMetadata} from \"../metadata/ColumnMetadata\";\nimport {ForeignKeyMetadata} from \"../metadata/ForeignKeyMetadata\";\nimport {Connection} from \"../connection/Connection\";\nimport {IndexMetadata} from \"../metadata/IndexMetadata\";\n\n/**\n * Creates EntityMetadata for junction tables of the closure entities.\n * Closure junction tables are tables generated by closure entities.\n */\nexport class ClosureJunctionEntityMetadataBuilder {\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 closure junction of the given closure entity.\n */\n build(parentClosureEntityMetadata: EntityMetadata) {\n\n // create entity metadata itself\n const entityMetadata = new EntityMetadata({\n parentClosureEntityMetadata: parentClosureEntityMetadata,\n connection: this.connection,\n args: {\n target: \"\",\n name: parentClosureEntityMetadata.tableNameWithoutPrefix,\n type: \"closure-junction\"\n }\n });\n entityMetadata.build();\n\n // create ancestor and descendant columns for new closure junction table\n parentClosureEntityMetadata.primaryColumns.forEach(primaryColumn => {\n entityMetadata.ownColumns.push(new ColumnMetadata({\n connection: this.connection,\n entityMetadata: entityMetadata,\n closureType: \"ancestor\",\n referencedColumn: primaryColumn,\n args: {\n target: \"\",\n mode: \"virtual\",\n propertyName: primaryColumn.propertyName + \"_ancestor\", // todo: naming strategy\n options: {\n primary: true,\n length: primaryColumn.length,\n type: primaryColumn.type\n }\n }\n }));\n entityMetadata.ownColumns.push(new ColumnMetadata({\n connection: this.connection,\n entityMetadata: entityMetadata,\n closureType: \"descendant\",\n referencedColumn: primaryColumn,\n args: {\n target: \"\",\n mode: \"virtual\",\n propertyName: primaryColumn.propertyName + \"_descendant\",\n options: {\n primary: true,\n length: primaryColumn.length,\n type: primaryColumn.type,\n }\n }\n }));\n });\n\n entityMetadata.ownIndices = [\n new IndexMetadata({\n entityMetadata: entityMetadata,\n columns: [entityMetadata.ownColumns[0]],\n args: {\n target: entityMetadata.target,\n synchronize: true\n }\n }),\n new IndexMetadata({\n entityMetadata: entityMetadata,\n columns: [entityMetadata.ownColumns[1]],\n args: {\n target: entityMetadata.target,\n synchronize: true\n }\n })\n ];\n\n // if tree level column was defined by a closure entity then add it to the junction columns as well\n if (parentClosureEntityMetadata.treeLevelColumn) {\n entityMetadata.ownColumns.push(new ColumnMetadata({\n connection: this.connection,\n entityMetadata: entityMetadata,\n args: {\n target: \"\",\n mode: \"virtual\",\n propertyName: \"level\",\n options: {\n type: this.connection.driver.mappedDataTypes.treeLevel,\n }\n }\n }));\n }\n\n // create junction table foreign keys\n entityMetadata.foreignKeys = [\n new ForeignKeyMetadata({\n entityMetadata: entityMetadata,\n referencedEntityMetadata: parentClosureEntityMetadata,\n columns: [entityMetadata.ownColumns[0]],\n referencedColumns: parentClosureEntityMetadata.primaryColumns,\n // onDelete: \"CASCADE\" // todo: does not work in mssql for some reason\n }),\n new ForeignKeyMetadata({\n entityMetadata: entityMetadata,\n referencedEntityMetadata: parentClosureEntityMetadata,\n columns: [entityMetadata.ownColumns[1]],\n referencedColumns: parentClosureEntityMetadata.primaryColumns,\n // onDelete: \"CASCADE\" // todo: does not work in mssql for some reason\n }),\n ];\n\n return entityMetadata;\n }\n\n}\n"],"sourceRoot":".."}
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