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PORestFul Api Node.js & Mongoose: handling errors
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copied!<p>I want to create a restful API with Node.js, Express, MongoDB and Mongoose.</p> <p>Schema, model and route are below:</p> <pre><code>// Schema var OperatorSchema = new Schema({ name : { type: String, unique: true , required: true}, short_name : { type: String, unique:true, required: true }, }); Operator = mongoose.model('Operator', OperatorSchema); // My Api for Operator app.post('/api/operators', common.createOperator); exports.createOperator = function(req, res){ Operator.create(req.body, function (err, operator) { // If failed, return error message if (err) { console.log(err); res.send(404, err) } else { res.send(operator) } }) }; </code></pre> <p>I have three questions:</p> <p><strong>1 -</strong> Handling error like that I found that the err object passed to the callback has a different structure depending if the error comes from mongoose or mongo. </p> <pre><code>// Mongo Error: { "name": "MongoError", "err": "E11000 duplicate key error index: ussdauto.operators.$name_1 dup key: { : \"OpTest\" }", "code": 11000, "n": 0, "connectionId": 231, "ok": 1 } // Mongoose Error: { "message": "Validation failed", "name": "ValidationError", "errors": { "short_name": { "message": "Path `short_name` is required.", "name": "ValidatorError", "path": "short_name", "type": "required" } } } </code></pre> <p>I don't want to expose all the details about errors: only a message explaining the error is enough, no need for to know if it's a mongoerror or a validationError for example. How do you manage it?</p> <p><strong>2 -</strong> The second question is more global: I'll have multiple API and each time I'll need to do the same work: check if there is errors, if some return via API in JSON the error message and if not continue normally. How can I use only one function to process errors and use it everywhere? </p> <p><strong>3 -</strong> I came from a python world (Django in fact) where Tastypie was a really great module which was handling all of that stuff itself. Do you know if such a module exists for Node.js + Express?</p>

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