Method constructor

packages/client/src/runtime/getPrismaClient.ts:334–496

(optionsArg: PrismaClientOptions)

    _createPrismaPromise = createPrismaPromiseFactory()

    constructor(optionsArg: PrismaClientOptions) {
      if (!optionsArg) {
        throw new PrismaClientInitializationError(
          `\
\`PrismaClient\` needs to be constructed with a non-empty, valid \`PrismaClientOptions\`:

\`\`\`
new PrismaClient({
  ...
})
\`\`\`

or

\`\`\`
constructor() {
  super({ ... });
}
\`\`\`
          `,
          clientVersion,
        )
      }
      config = optionsArg.__internal?.configOverride?.(config) ?? config
      validatePrismaClientOptions(optionsArg, config)

      // prevents unhandled error events when users do not explicitly listen to them
      const logEmitter = new EventEmitter().on('error', () => {}) as LogEmitter

      this._extensions = MergedExtensionsList.empty()
      this._previewFeatures = config.previewFeatures
      this._clientVersion = config.clientVersion ?? clientVersion
      this._activeProvider = config.activeProvider
      this._globalOmit = optionsArg?.omit
      this._tracingHelper = getTracingHelper()

      /**
       * Initialise and validate the Driver Adapter, if provided.
       */

      let adapter: SqlDriverAdapterFactory | undefined
      if (optionsArg.adapter) {
        adapter = optionsArg.adapter

        // Note:
        // - `getConfig(..).datasources[0].provider` can be `postgresql`, `postgres`, `mysql`, or other known providers
        // - `getConfig(..).datasources[0].activeProvider`, stored in `config.activeProvider`, can be `postgresql`, `mysql`, or other known providers
        // - `adapter.provider` can be `postgres`, `mysql`, or `sqlite`, and changing this requires changes to Rust as well,
        //    see https://github.com/prisma/prisma-engines/blob/d116c37d7d27aee74fdd840fc85ab2b45407e5ce/query-engine/driver-adapters/src/types.rs#L22-L23.
        //
        // TODO: Normalize these provider names once and for all in Prisma 6.
        const expectedDriverAdapterProvider =
          config.activeProvider === 'postgresql'
            ? 'postgres'
            : // CockroachDB is only accessible through Postgres driver adapters
              config.activeProvider === 'cockroachdb'
              ? 'postgres'
              : config.activeProvider