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techfort / LokiJS

javascript embeddable / in-memory database
http:/techfort.github.io/LokiJS
MIT License
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Cannot read property 'chain' of null, Electron #872

Closed GobsRuiz closed 2 years ago

GobsRuiz commented 3 years ago

I'm trying to return a list / array of database data.

I found some examples, a little confusing, I tried here but it didn't work. My code right now looks like this

var clientes = db.getCollection('clientes'); var resultado = clientes.chain().simplesort("mame").data(); console.log(resultado)

In the console it returns this: "index.js:9 Uncaught TypeError: Cannot read property 'chain' of null"

i'm using loki js

work67 commented 3 years ago

What do you get if you try: var items = clientes.data

explanation: "data" can be two things:

  1. a property of the collection - gets you all collection data as an array of objects. Careful because it is passed by reference, so for example if you modify "items" above like: delete items[0] the 1st document from the collection clientes will be deleted.

  2. "data" can also mean the data() method (function) of the resultSet object - it does a similar job as "data" property above but is used with chain()

I suppose you are not initialising the "db" properly so whatever you do will return null/undefined. That's why I asked about what clientes.data returns.

Cheers.

stale[bot] commented 3 years ago

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