SwiftData: Accessing a context outside of a view not possible.

Question

Getting a warning from the Xcode compiler about accessing a context outside of a view. It popped up in white text on a purple background, not the usual white on yellow warning color.

The actual warning text is: Accessing Environment<ModelContext>'s value outside of being installed on a View. This will always read the default value and will not update.

This seems to mean that any datastore access must be done within a view, and isn't possible from the model or some sort of DataManager class. Am I reading this correctly? I'm trying to keep the business logic out of the views. I can do it with everything except the datastore code because of this context issue. Doesn't seem to make sense.

Suggestions greatly appreciated.

Swift

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Posted by

OldBrian

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I hope this will help or at least provide hints: https://www.hackingwithswift.com/forums/swift/trying-to-access-managed-object-context-through-a-model/23266

—
Claude31

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Answer 1

I am running into this same problem. Did you ever resolve this?

Posted by

nojkepop

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Answer 2

Receiving the same warning with:

import SwiftData

@MainActor class…: ObservableObject {
@Environment(\.modelContext) private var modelContext
init() {
let descriptor = FetchDescriptor<Location>(predicate: #Predicate {$0.areaName != ""})
let count = (try? modelContext.fetchCount(descriptor)) ?? 0 <<== Warning here
}}

Then the App Crashes

Not interested in a View with a List
Just a [fetchCount]

Posted by

724QD58FHA

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SwiftData: Accessing a context outside of a view not possible.

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