Experiments DB Dev
41 lines
1.2 KiB
JavaScript
41 lines
1.2 KiB
JavaScript
const { validationResult } = require('express-validator');
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/**
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* Validation check middleware — call after express-validator chains.
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* Returns 422 with field-level errors if validation fails.
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*/
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function validateRequest(req, res, next) {
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const errors = validationResult(req);
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if (!errors.isEmpty()) {
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return res.status(422).json({
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error: 'Validation failed',
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details: errors.array().map((e) => ({ field: e.path, message: e.msg })),
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});
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}
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next();
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}
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/**
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* Global Express error handler — must be registered last.
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*/
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function globalErrorHandler(err, req, res, next) {
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console.error(err);
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// Prisma known errors
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if (err.code === 'P2025') {
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return res.status(404).json({ error: 'Record not found' });
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}
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if (err.code === 'P2003') {
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return res.status(400).json({ error: 'Foreign key constraint failed — referenced record does not exist' });
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}
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if (err.code === 'P2002') {
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return res.status(409).json({ error: 'A record with these unique fields already exists' });
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}
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const status = err.status || 500;
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const message = process.env.NODE_ENV === 'production' ? 'Internal server error' : err.message;
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res.status(status).json({ error: message });
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}
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module.exports = { validateRequest, globalErrorHandler };
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