@lcdev/objection v0.3.3

Objection Utilities

Provides some utility functions for common things we do with Objection.

yarn add @lcdev/objection@VERSION

Logging

Use addLogsToKnex to include queries in your logger (@lcdev/logger) output.

import { addLogsToKnex } from '@lcdev/objection';

// sets up logger to write queries as they happen
// usually, we'd do this during construction of the connection
addLogsToKnex(connection, logger);

Identifier Mapping

Use identifierMapping to rename columns when parsing from database and when formatting into.

import { identifierMapping } from '@lcdev/objection';

class MyModel extends Model {
  static tableName = 'some_table_name';
  static columnNameMappers = identifierMapping({
    x: 'primaryFeatureX',
    y: 'primaryFeatureY',
  });

  ...
}

Errors (Postgres)

Use postgresErrMiddleware to catch specific postgres errors.

import { postgresErrMiddleware, PostgresErrors } from '@lcdev/objection';

// specific catch-all for reference errors
app.use(
  postgresErrMiddleware({
    [PostgresErrors.ForeignKeyViolation]: () =>
      Promise.reject(
        err(
          400,
          'A reference between items in the app would be broken with this action',
          ApiErrorCode.FKError,
        ),
      ),
  }),
);