CODEWITHSUNDEEP
javascriptnode.js
Denis Golovkin
Denis Golovkin

Reputation: 106

Node.js, TypeError: xxx is not a function, in require'd file

I have two files (for example).

./database/user.js

module.exports = {
    getUniqueByID: function(params){
        doSomething();
        return anUserObject;
    }
};

./database/uperm.js

var dbUser = require('./user.js');
module.exports = {
    createNew: function(params){
        dbUser.getUniqueByID(uid);
        doSomethingElse();
    }
};

Function createNew() from uperm.js always throws an exception:

.../uperm.js:123
dbUser.getUniqueByID(uid);
TypeError: dbUser.getUniqueByID is not a function

But, if i change ./database/uperm.js to be:

module.exports = {
    createNew: function(params){
        require('./user.js').getUniqueByID(uid);
        doSomethingElse();
    }
};

Then getUniqueByID() from user.js is called by createNew() from uperm.js, without any exception.

But I don't whant to use require('./user.js') everywhere, instead of assigning it to dbUser variable.

What's wrong in case of using variable? Absolutely similar code in other files of my project seems to be ok.

Upvotes: 2

Views: 6879

Answers (1)

christophetd
christophetd

Reputation: 3874

Since you have circular dependencies, try to set properties of the module.exports instead of directly overwriting it:

var functions = {
   getUniqueByID: xxx
};

for(var key in functions) {
    module.exports[key] = functions[key];
}

(From the idea provided in this answer)

Upvotes: 2

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