modelName is undefined

Question

i am new in node js. Please helm me out. In the following code "modelName" is a variable which may be changed in each function call but it is showing me error that "modelName" is undefined. Thanks

"createModel": function(modelName, callback) {
    app.models.modelName.create(self.modelName(), function(error, modelInstance) {
        if(!error){
            callback(null, modelInstance.id);
        }
    });
}

score 0 · Accepted Answer · answered Apr 18 '16 at 18:36

I'm not sure what you're asking. Are you referring to the app.models.modelName or the self.modelName() reference? Either way, those are completely different references than the modelName parameter you are defining in the function signature (modelName, callback).

If I read your question correctly, you are trying to access a property dynamically based on the modelName that is passed in. If so, you can't use dot notation, try something like this:

"createModel": function(modelName, callback) {
    app.models[modelName].create(self[modelName](), function (error, modelInstance) {
        if(!error){
            callback(null, modelInstance.id);
        }
    });
}

Thanks Michael, you understood my question correctly and your solution is working fine... thanks once again — Shakeel Ahmad, Apr 18 '16 at 19:37

score 0 · Answer 2 · answered Apr 18 '16 at 18:37

"createModel": function(modelName, callback) {
    app.models[modelName].create(self.modelName(), function(error, modelInstance) {
        if(!error){
            callback(null, modelInstance.id);
        }
    });
}

You need to access dynamic properties with bracket notation instead of dot notation.

modelName is undefined

2 Answers2