###### tags: `MERN`, `Debugging`, `JavaScript`
# MERN Common Errors

**Map is Not a Function**


.map function is **only** for arrays `[]` and this error occurs when the data you are iterating through is not a an array but another data structure like an object `{}`.

To fix this, we need to change our data type to an array `[]`. First step is to identify our **state** that holds the data.

<img src="https://i.imgur.com/wZYaDUZ.png" />

<img src="https://i.imgur.com/7iYeCd6.png" />

Here is an example of data pulling from our API:

<img src="https://i.imgur.com/wmuBVQh.png" width="150px"/>

Our error is in our setter:

<img src="https://i.imgur.com/k8RoDSj.png" />

Notice the DATA CONTAINS AN OBJECT CALLED DATA, AND AN ARRAY CALLED DATA INSIDE THE DATA OBJECT.

HERE IS THE FIX:


WE HAVE NOTATED CORRECTLY INTO THE BUCKET OF DATA, AND ARE NOW ABLE TO ITERATE OVER THE DATA BECAUSE IT IS NOW AN ARRAY

**this section up above is not finished**

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ERROR -> "cannot find module..."


WHY?
Pathing Issues, Please check your folder structure which should look something like this below:



SOLUTION -> change your path url of the file you are trying to import by using dots and slashes, like this:

./config/mongoose.config

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