typeorm
Version:
Data-Mapper ORM for TypeScript, ES7, ES6, ES5. Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, MongoDB databases.
51 lines (49 loc) • 1.98 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.LegacyOracleNamingStrategy = void 0;
const RandomGenerator_1 = require("../util/RandomGenerator");
const DefaultNamingStrategy_1 = require("./DefaultNamingStrategy");
const error_1 = require("../error");
/**
* Naming strategy for legacy Oracle database with 30 bytes identifier limit.
*
* Currently, only column name must be shorten in order to avoid ORA-00972.
* Issues with other identifiers were fixed.
*/
class LegacyOracleNamingStrategy extends DefaultNamingStrategy_1.DefaultNamingStrategy {
constructor(shortenStrategy = "hash") {
super();
this.IDENTIFIER_MAX_SIZE = 30;
this.DEFAULT_COLUMN_PREFIX = "COL_";
this.shortenStrategy = shortenStrategy;
}
columnName(propertyName, customName, embeddedPrefixes) {
const longName = super.columnName(propertyName, customName, embeddedPrefixes);
if (this.shortenStrategy === "truncate") {
return this.truncateIdentifier(longName);
}
else if (this.shortenStrategy === "hash") {
return this.hashIdentifier(longName, this.DEFAULT_COLUMN_PREFIX);
}
else {
throw new error_1.TypeORMError(`Invalid shortenStrategy`);
}
}
hashIdentifier(input, prefix) {
if (prefix.length >= this.IDENTIFIER_MAX_SIZE) {
throw new error_1.TypeORMError(`Prefix must be shorter than IDENTIFIER_MAX_SIZE`);
}
return (prefix +
RandomGenerator_1.RandomGenerator.sha1(input).substring(0, this.IDENTIFIER_MAX_SIZE - prefix.length));
}
truncateIdentifier(input) {
if (input.length > this.IDENTIFIER_MAX_SIZE) {
return input.substring(0, this.IDENTIFIER_MAX_SIZE);
}
else {
return input;
}
}
}
exports.LegacyOracleNamingStrategy = LegacyOracleNamingStrategy;
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