How come modifying the variable name in a post request fails to include the string array into the database? This issue involves the use of express and mongodb

To simplify the question, the error scenario has been labeled as Scenario A, and the correct working scenario as Scenario B. The main concern is understanding why this discrepancy occurs.

Scenario A (error)

Step 1 https://i.sstatic.net/OyKUl.png

Step 2 & 3 https://i.sstatic.net/lrWqr.png

Scenario B (working)

Step 1 https://i.sstatic.net/B9nhT.png

Step 2 & 3 https://i.sstatic.net/I39fN.png

The objective is to comprehend why Scenario A fails to add the string of array/users to the database. Any insights would be greatly appreciated!

Answer №1

The reason behind this issue lies in the JSON structure manipulation. When a variable is included in the JSON without specifying a field name, the default behavior assigns the variable name as the field name.

For instance, assuming we have var y = 7, using {y} will automatically translate to {y: 7}, while {z: y} will result in {z: 7}.

This same concept can be extended to your Cycle object situation; in Scenario 1, you've initialized it with {itemsA: itemsA} instead of {items: itemsA}.

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