Troubleshooting issue: Dexie.js query using .equals not functioning properly in conjunction with localStorage

I am attempting to retrieve a value from indexedDB using Dexie.js, but it seems that the value stored in localStorage is not being recognized.

I have tried various methods including async/await, promises, placing the localStorage call in created, mounted, outside export default, and unfortunately none of these approaches have worked.

fetchData() {
  return dbDexie.tactics1
    .where('i')
    .equals(localStorage.getItem("id")) // This line is causing the issue
    .toArray()
    .then((r) => r[0].f);
}

Answer №1

.checkEquality stringent comparison

The checkEquality function serves as a rigorous equality assessment. For instance, if the variable is of number type in one database, and a string type in another, they won't match due to their different types. It's worth noting that the second database only stores strings.

To overcome this obstacle, it's customary to employ JSON.parse when extracting data from the second database, converting serialized data:

retrieveData() {
  return dbExample.tasks
    .where('i')
    .checkEquality(JSON.parse(localStorage.getItem("id")))
    .toArray()
    .then((result) => result[0].f);
},

Alternatively, you can explicitly convert the value from the second database to a Number type:

.checkEquality(Number(localStorage.getItem("id")))

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