????
Your IP : 3.141.107.132
import { TypeORMError } from "../error";
/**
* Index metadata contains all information about table's index.
*/
export class IndexMetadata {
// ---------------------------------------------------------------------
// Constructor
// ---------------------------------------------------------------------
constructor(options) {
/**
* Indicates if this index must be unique.
*/
this.isUnique = false;
/**
* The SPATIAL modifier indexes the entire column and does not allow indexed columns to contain NULL values.
* Works only in MySQL.
*/
this.isSpatial = false;
/**
* The FULLTEXT modifier indexes the entire column and does not allow prefixing.
* Works only in MySQL.
*/
this.isFulltext = false;
/**
* NULL_FILTERED indexes are particularly useful for indexing sparse columns, where most rows contain a NULL value.
* In these cases, the NULL_FILTERED index can be considerably smaller and more efficient to maintain than
* a normal index that includes NULL values.
*
* Works only in Spanner.
*/
this.isNullFiltered = false;
/**
* Indicates if this index must synchronize with database index.
*/
this.synchronize = true;
/**
* Indexed columns.
*/
this.columns = [];
/**
* Map of column names with order set.
* Used only by MongoDB driver.
*/
this.columnNamesWithOrderingMap = {};
this.entityMetadata = options.entityMetadata;
this.embeddedMetadata = options.embeddedMetadata;
if (options.columns)
this.columns = options.columns;
if (options.args) {
this.target = options.args.target;
if (options.args.synchronize !== null &&
options.args.synchronize !== undefined)
this.synchronize = options.args.synchronize;
this.isUnique = !!options.args.unique;
this.isSpatial = !!options.args.spatial;
this.isFulltext = !!options.args.fulltext;
this.isNullFiltered = !!options.args.nullFiltered;
this.parser = options.args.parser;
this.where = options.args.where;
this.isSparse = options.args.sparse;
this.isBackground = options.args.background;
this.isConcurrent = options.args.concurrent;
this.expireAfterSeconds = options.args.expireAfterSeconds;
this.givenName = options.args.name;
this.givenColumnNames = options.args.columns;
}
}
// ---------------------------------------------------------------------
// Public Build Methods
// ---------------------------------------------------------------------
/**
* Builds some depend index properties.
* Must be called after all entity metadata's properties map, columns and relations are built.
*/
build(namingStrategy) {
if (this.synchronize === false) {
this.name = this.givenName;
return this;
}
const map = {};
// if columns already an array of string then simply return it
if (this.givenColumnNames) {
let columnPropertyPaths = [];
if (Array.isArray(this.givenColumnNames)) {
columnPropertyPaths = this.givenColumnNames.map((columnName) => {
if (this.embeddedMetadata)
return (this.embeddedMetadata.propertyPath +
"." +
columnName);
return columnName.trim();
});
columnPropertyPaths.forEach((propertyPath) => (map[propertyPath] = 1));
}
else {
// todo: indices in embeds are not implemented in this syntax. deprecate this syntax?
// if columns is a function that returns array of field names then execute it and get columns names from it
const columnsFnResult = this.givenColumnNames(this.entityMetadata.propertiesMap);
if (Array.isArray(columnsFnResult)) {
columnPropertyPaths = columnsFnResult.map((i) => String(i));
columnPropertyPaths.forEach((name) => (map[name] = 1));
}
else {
columnPropertyPaths = Object.keys(columnsFnResult).map((i) => String(i));
Object.keys(columnsFnResult).forEach((columnName) => (map[columnName] = columnsFnResult[columnName]));
}
}
this.columns = columnPropertyPaths
.map((propertyPath) => {
const columnWithSameName = this.entityMetadata.columns.find((column) => column.propertyPath === propertyPath);
if (columnWithSameName) {
return [columnWithSameName];
}
const relationWithSameName = this.entityMetadata.relations.find((relation) => relation.isWithJoinColumn &&
relation.propertyName === propertyPath);
if (relationWithSameName) {
return relationWithSameName.joinColumns;
}
const indexName = this.givenName
? '"' + this.givenName + '" '
: "";
const entityName = this.entityMetadata.targetName;
throw new TypeORMError(`Index ${indexName}contains column that is missing in the entity (${entityName}): ` +
propertyPath);
})
.reduce((a, b) => a.concat(b));
}
this.columnNamesWithOrderingMap = Object.keys(map).reduce((updatedMap, key) => {
const column = this.entityMetadata.columns.find((column) => column.propertyPath === key);
if (column)
updatedMap[column.databasePath] = map[key];
return updatedMap;
}, {});
this.name = this.givenName
? this.givenName
: namingStrategy.indexName(this.entityMetadata.tableName, this.columns.map((column) => column.databaseName), this.where);
return this;
}
}
//# sourceMappingURL=IndexMetadata.js.map