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AbstractSqliteDriver.ts
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AbstractSqliteDriver.ts
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import {Driver} from "../Driver";
import {ObjectLiteral} from "../../common/ObjectLiteral";
import {ColumnMetadata} from "../../metadata/ColumnMetadata";
import {DateUtils} from "../../util/DateUtils";
import {Connection} from "../../connection/Connection";
import {RdbmsSchemaBuilder} from "../../schema-builder/RdbmsSchemaBuilder";
import {MappedColumnTypes} from "../types/MappedColumnTypes";
import {ColumnType} from "../types/ColumnTypes";
import {QueryRunner} from "../../query-runner/QueryRunner";
import {DataTypeDefaults} from "../types/DataTypeDefaults";
import {TableColumn} from "../../schema-builder/table/TableColumn";
import {BaseConnectionOptions} from "../../connection/BaseConnectionOptions";
import {EntityMetadata} from "../../metadata/EntityMetadata";
import {OrmUtils} from "../../util/OrmUtils";
import {ApplyValueTransformers} from "../../util/ApplyValueTransformers";
/**
* Organizes communication with sqlite DBMS.
*/
export abstract class AbstractSqliteDriver implements Driver {
// -------------------------------------------------------------------------
// Public Properties
// -------------------------------------------------------------------------
/**
* Connection used by driver.
*/
connection: Connection;
/**
* Sqlite has a single QueryRunner because it works on a single database connection.
*/
queryRunner?: QueryRunner;
/**
* Real database connection with sqlite database.
*/
databaseConnection: any;
// -------------------------------------------------------------------------
// Public Implemented Properties
// -------------------------------------------------------------------------
/**
* Connection options.
*/
options: BaseConnectionOptions;
/**
* Master database used to perform all write queries.
*/
database?: string;
/**
* Indicates if replication is enabled.
*/
isReplicated: boolean = false;
/**
* SQLite underlying library.
*/
sqlite: any;
/**
* Indicates if tree tables are supported by this driver.
*/
treeSupport = true;
/**
* Gets list of supported column data types by a driver.
*
* @see https://www.tutorialspoint.com/sqlite/sqlite_data_types.htm
* @see https://sqlite.org/datatype3.html
*/
supportedDataTypes: ColumnType[] = [
"int",
"integer",
"tinyint",
"smallint",
"mediumint",
"bigint",
"unsigned big int",
"int2",
"int8",
"integer",
"character",
"varchar",
"varying character",
"nchar",
"native character",
"nvarchar",
"text",
"clob",
"text",
"blob",
"real",
"double",
"double precision",
"float",
"real",
"numeric",
"decimal",
"boolean",
"date",
"time",
"datetime"
];
/**
* Gets list of column data types that support length by a driver.
*/
withLengthColumnTypes: ColumnType[] = [
"character",
"varchar",
"varying character",
"nchar",
"native character",
"nvarchar",
"text",
"blob",
"clob"
];
/**
* Gets list of spatial column data types.
*/
spatialTypes: ColumnType[] = [];
/**
* Gets list of column data types that support precision by a driver.
*/
withPrecisionColumnTypes: ColumnType[] = [];
/**
* Gets list of column data types that support scale by a driver.
*/
withScaleColumnTypes: ColumnType[] = [];
/**
* Orm has special columns and we need to know what database column types should be for those types.
* Column types are driver dependant.
*/
mappedDataTypes: MappedColumnTypes = {
createDate: "datetime",
createDateDefault: "datetime('now')",
updateDate: "datetime",
updateDateDefault: "datetime('now')",
deleteDate: "datetime",
deleteDateNullable: true,
version: "integer",
treeLevel: "integer",
migrationId: "integer",
migrationName: "varchar",
migrationTimestamp: "bigint",
cacheId: "int",
cacheIdentifier: "varchar",
cacheTime: "bigint",
cacheDuration: "int",
cacheQuery: "text",
cacheResult: "text",
metadataType: "varchar",
metadataDatabase: "varchar",
metadataSchema: "varchar",
metadataTable: "varchar",
metadataName: "varchar",
metadataValue: "text",
};
/**
* Default values of length, precision and scale depends on column data type.
* Used in the cases when length/precision/scale is not specified by user.
*/
dataTypeDefaults: DataTypeDefaults;
/**
* No documentation specifying a maximum length for identifiers could be found
* for SQLite.
*/
maxAliasLength?: number;
// -------------------------------------------------------------------------
// Constructor
// -------------------------------------------------------------------------
constructor(connection: Connection) {
this.connection = connection;
this.options = connection.options as BaseConnectionOptions;
}
// -------------------------------------------------------------------------
// Public Abstract
// -------------------------------------------------------------------------
/**
* Creates a query runner used to execute database queries.
*/
abstract createQueryRunner(mode: "master"|"slave"): QueryRunner;
// -------------------------------------------------------------------------
// Public Methods
// -------------------------------------------------------------------------
/**
* Performs connection to the database.
*/
async connect(): Promise<void> {
this.databaseConnection = await this.createDatabaseConnection();
}
/**
* Makes any action after connection (e.g. create extensions in Postgres driver).
*/
afterConnect(): Promise<void> {
return Promise.resolve();
}
/**
* Closes connection with database.
*/
async disconnect(): Promise<void> {
return new Promise<void>((ok, fail) => {
this.queryRunner = undefined;
this.databaseConnection.close((err: any) => err ? fail(err) : ok());
});
}
/**
* Creates a schema builder used to build and sync a schema.
*/
createSchemaBuilder() {
return new RdbmsSchemaBuilder(this.connection);
}
/**
* Prepares given value to a value to be persisted, based on its column type and metadata.
*/
preparePersistentValue(value: any, columnMetadata: ColumnMetadata): any {
if (columnMetadata.transformer)
value = ApplyValueTransformers.transformTo(columnMetadata.transformer, value);
if (value === null || value === undefined)
return value;
if (columnMetadata.type === Boolean || columnMetadata.type === "boolean") {
return value === true ? 1 : 0;
} else if (columnMetadata.type === "date") {
return DateUtils.mixedDateToDateString(value);
} else if (columnMetadata.type === "time") {
return DateUtils.mixedDateToTimeString(value);
} else if (columnMetadata.type === "datetime" || columnMetadata.type === Date) {
// to string conversation needs because SQLite stores date as integer number, when date came as Object
// TODO: think about `toUTC` conversion
return DateUtils.mixedDateToUtcDatetimeString(value);
} else if (columnMetadata.type === "simple-array") {
return DateUtils.simpleArrayToString(value);
} else if (columnMetadata.type === "simple-json") {
return DateUtils.simpleJsonToString(value);
} else if (columnMetadata.type === "simple-enum") {
return DateUtils.simpleEnumToString(value);
}
return value;
}
/**
* Prepares given value to a value to be hydrated, based on its column type or metadata.
*/
prepareHydratedValue(value: any, columnMetadata: ColumnMetadata): any {
if (value === null || value === undefined)
return columnMetadata.transformer ? ApplyValueTransformers.transformFrom(columnMetadata.transformer, value) : value;
if (columnMetadata.type === Boolean || columnMetadata.type === "boolean") {
value = value ? true : false;
} else if (columnMetadata.type === "datetime" || columnMetadata.type === Date) {
/**
* Fix date conversion issue
*
* If the format of the date string is "2018-03-14 02:33:33.906", Safari (and iOS WKWebView) will convert it to an invalid date object.
* We need to modify the date string to "2018-03-14T02:33:33.906Z" and Safari will convert it correctly.
*
* ISO 8601
* https://www.w3.org/TR/NOTE-datetime
*/
if (value && typeof value === "string") {
// There are various valid time string formats a sqlite time string might have:
// https://www.sqlite.org/lang_datefunc.html
// There are two separate fixes we may need to do:
// 1) Add 'T' separator if space is used instead
// 2) Add 'Z' UTC suffix if no timezone or offset specified
if (/^\d\d\d\d-\d\d-\d\d \d\d:\d\d/.test(value)) {
value = value.replace(" ", "T");
}
if (/^\d\d\d\d-\d\d-\d\dT\d\d:\d\d(:\d\d(\.\d\d\d)?)?$/.test(value)) {
value += "Z";
}
}
value = DateUtils.normalizeHydratedDate(value);
} else if (columnMetadata.type === "date") {
value = DateUtils.mixedDateToDateString(value);
} else if (columnMetadata.type === "time") {
value = DateUtils.mixedTimeToString(value);
} else if (columnMetadata.type === "simple-array") {
value = DateUtils.stringToSimpleArray(value);
} else if (columnMetadata.type === "simple-json") {
value = DateUtils.stringToSimpleJson(value);
} else if ( columnMetadata.type === "simple-enum" ) {
value = DateUtils.stringToSimpleEnum(value, columnMetadata);
}
if (columnMetadata.transformer)
value = ApplyValueTransformers.transformFrom(columnMetadata.transformer, value);
return value;
}
/**
* Replaces parameters in the given sql with special escaping character
* and an array of parameter names to be passed to a query.
*/
escapeQueryWithParameters(sql: string, parameters: ObjectLiteral, nativeParameters: ObjectLiteral): [string, any[]] {
const builtParameters: any[] = Object.keys(nativeParameters).map(key => {
// Mapping boolean values to their numeric representation
if (typeof nativeParameters[key] === "boolean") {
return nativeParameters[key] === true ? 1 : 0;
}
return nativeParameters[key];
});
if (!parameters || !Object.keys(parameters).length)
return [sql, builtParameters];
const keys = Object.keys(parameters).map(parameter => "(:(\\.\\.\\.)?" + parameter + "\\b)").join("|");
sql = sql.replace(new RegExp(keys, "g"), (key: string): string => {
let value: any;
let isArray = false;
if (key.substr(0, 4) === ":...") {
isArray = true;
value = parameters[key.substr(4)];
} else {
value = parameters[key.substr(1)];
}
if (isArray) {
return value.map((v: any) => {
builtParameters.push(v);
return "?";
// return "$" + builtParameters.length;
}).join(", ");
} else if (value instanceof Function) {
return value();
} else {
builtParameters.push(value);
return "?";
// return "$" + builtParameters.length;
}
}); // todo: make replace only in value statements, otherwise problems
return [sql, builtParameters];
}
/**
* Escapes a column name.
*/
escape(columnName: string): string {
return "\"" + columnName + "\"";
}
/**
* Build full table name with database name, schema name and table name.
* E.g. "myDB"."mySchema"."myTable"
*
* Returns only simple table name because all inherited drivers does not supports schema and database.
*/
buildTableName(tableName: string, schema?: string, database?: string): string {
return tableName;
}
/**
* Creates a database type from a given column metadata.
*/
normalizeType(column: { type?: ColumnType, length?: number | string, precision?: number|null, scale?: number }): string {
if (column.type === Number || column.type === "int") {
return "integer";
} else if (column.type === String) {
return "varchar";
} else if (column.type === Date) {
return "datetime";
} else if (column.type === Boolean) {
return "boolean";
} else if (column.type === "uuid") {
return "varchar";
} else if (column.type === "simple-array") {
return "text";
} else if (column.type === "simple-json") {
return "text";
} else if (column.type === "simple-enum") {
return "varchar";
} else {
return column.type as string || "";
}
}
/**
* Normalizes "default" value of the column.
*/
normalizeDefault(columnMetadata: ColumnMetadata): string {
const defaultValue = columnMetadata.default;
if (typeof defaultValue === "number") {
return "" + defaultValue;
} else if (typeof defaultValue === "boolean") {
return defaultValue === true ? "1" : "0";
} else if (typeof defaultValue === "function") {
return defaultValue();
} else if (typeof defaultValue === "string") {
return `'${defaultValue}'`;
} else {
return defaultValue;
}
}
/**
* Normalizes "isUnique" value of the column.
*/
normalizeIsUnique(column: ColumnMetadata): boolean {
return column.entityMetadata.uniques.some(uq => uq.columns.length === 1 && uq.columns[0] === column);
}
/**
* Calculates column length taking into account the default length values.
*/
getColumnLength(column: ColumnMetadata): string {
return column.length ? column.length.toString() : "";
}
/**
* Normalizes "default" value of the column.
*/
createFullType(column: TableColumn): string {
let type = column.type;
if (column.enum) {
return "varchar";
}
if (column.length) {
type += "(" + column.length + ")";
} else if (column.precision !== null && column.precision !== undefined && column.scale !== null && column.scale !== undefined) {
type += "(" + column.precision + "," + column.scale + ")";
} else if (column.precision !== null && column.precision !== undefined) {
type += "(" + column.precision + ")";
}
if (column.isArray)
type += " array";
return type;
}
/**
* Obtains a new database connection to a master server.
* Used for replication.
* If replication is not setup then returns default connection's database connection.
*/
obtainMasterConnection(): Promise<any> {
return Promise.resolve();
}
/**
* Obtains a new database connection to a slave server.
* Used for replication.
* If replication is not setup then returns master (default) connection's database connection.
*/
obtainSlaveConnection(): Promise<any> {
return Promise.resolve();
}
/**
* Creates generated map of values generated or returned by database after INSERT query.
*/
createGeneratedMap(metadata: EntityMetadata, insertResult: any) {
const generatedMap = metadata.generatedColumns.reduce((map, generatedColumn) => {
let value: any;
if (generatedColumn.generationStrategy === "increment" && insertResult) {
value = insertResult;
// } else if (generatedColumn.generationStrategy === "uuid") {
// value = insertValue[generatedColumn.databaseName];
}
if (!value) return map;
return OrmUtils.mergeDeep(map, generatedColumn.createValueMap(value));
}, {} as ObjectLiteral);
return Object.keys(generatedMap).length > 0 ? generatedMap : undefined;
}
/**
* Differentiate columns of this table and columns from the given column metadatas columns
* and returns only changed.
*/
findChangedColumns(tableColumns: TableColumn[], columnMetadatas: ColumnMetadata[]): ColumnMetadata[] {
return columnMetadatas.filter(columnMetadata => {
const tableColumn = tableColumns.find(c => c.name === columnMetadata.databaseName);
if (!tableColumn)
return false; // we don't need new columns, we only need exist and changed
// console.log("table:", columnMetadata.entityMetadata.tableName);
// console.log("name:", tableColumn.name, columnMetadata.databaseName);
// console.log("type:", tableColumn.type, this.normalizeType(columnMetadata));
// console.log("length:", tableColumn.length, columnMetadata.length);
// console.log("precision:", tableColumn.precision, columnMetadata.precision);
// console.log("scale:", tableColumn.scale, columnMetadata.scale);
// console.log("comment:", tableColumn.comment, columnMetadata.comment);
// console.log("default:", tableColumn.default, columnMetadata.default);
// console.log("isPrimary:", tableColumn.isPrimary, columnMetadata.isPrimary);
// console.log("isNullable:", tableColumn.isNullable, columnMetadata.isNullable);
// console.log("isUnique:", tableColumn.isUnique, this.normalizeIsUnique(columnMetadata));
// console.log("isGenerated:", tableColumn.isGenerated, columnMetadata.isGenerated);
// console.log("==========================================");
return tableColumn.name !== columnMetadata.databaseName
|| tableColumn.type !== this.normalizeType(columnMetadata)
|| tableColumn.length !== columnMetadata.length
|| tableColumn.precision !== columnMetadata.precision
|| tableColumn.scale !== columnMetadata.scale
// || tableColumn.comment !== columnMetadata.comment || // todo
|| this.normalizeDefault(columnMetadata) !== tableColumn.default
|| tableColumn.isPrimary !== columnMetadata.isPrimary
|| tableColumn.isNullable !== columnMetadata.isNullable
|| tableColumn.isUnique !== this.normalizeIsUnique(columnMetadata)
|| (columnMetadata.generationStrategy !== "uuid" && tableColumn.isGenerated !== columnMetadata.isGenerated);
});
}
/**
* Returns true if driver supports RETURNING / OUTPUT statement.
*/
isReturningSqlSupported(): boolean {
return false;
}
/**
* Returns true if driver supports uuid values generation on its own.
*/
isUUIDGenerationSupported(): boolean {
return false;
}
/**
* Returns true if driver supports fulltext indices.
*/
isFullTextColumnTypeSupported(): boolean {
return false;
}
/**
* Creates an escaped parameter.
*/
createParameter(parameterName: string, index: number): string {
// return "$" + (index + 1);
return "?";
// return "$" + parameterName;
}
// -------------------------------------------------------------------------
// Protected Methods
// -------------------------------------------------------------------------
/**
* Creates connection with the database.
*/
protected createDatabaseConnection() {
throw new Error("Do not use AbstractSqlite directly, it has to be used with one of the sqlite drivers");
}
/**
* If driver dependency is not given explicitly, then try to load it via "require".
*/
protected loadDependencies(): void {
// dependencies have to be loaded in the specific driver
}
}