starred/CoreStore-JohnEstropia
1
0
Fork 0
mirror of https://github.com/JohnEstropia/CoreStore.git synced 2026-07-21 12:08:39 +02:00
Code Issues 95 Packages Projects Releases 10 Wiki Activity

ERROR: Attempted to fetch from a 'CoreStore.DataStack' outside the main thread #364

New Issue
Closed
opened 2025-12-29 18:26:07 +01:00 by adam · 2 comments
adam commented 2025-12-29 18:26:07 +01:00
Owner
Copy Link
Copy Source

Originally created by @bradleydworak on GitHub (Jul 9, 2021).

Hi,

I'm new to CoreStore and getting an error attempting to try fetching objects. I'm placing an assertion before the datastack execution to confirm I'm on the main thread. I'm attempting to execute the code from a Swift Button action as shown below:

Button(action: {
assert(Thread.isMainThread)
print(Thread.current)
dataStack.perform(
asynchronous: { (transaction) -> Void in
let myimgs = try dataStack.fetchAll(From())
},
completion: { (result) -> Void in
switch result {
case .success:
print("success!")
case .failure(let error): print(error)
}
}
)
})

The result is:
<NSThread: 0x6000009f04c0>{number = 1, name = main}
❗ [CoreStore: Assertion Failure] DataStack+Querying.swift:146 fetchAll(::)
↪︎ Attempted to fetch from a 'CoreStore.DataStack' outside the main thread.

Can anyone assist? I'm using CoreStore 8.0.0, Xcode 12.4, Swift v5. I appreciate you help.

Thanks,

Brad

Originally created by @bradleydworak on GitHub (Jul 9, 2021). Hi, I'm new to CoreStore and getting an error attempting to try fetching objects. I'm placing an assertion before the datastack execution to confirm I'm on the main thread. I'm attempting to execute the code from a Swift Button action as shown below: Button(action: { assert(Thread.isMainThread) print(Thread.current) dataStack.perform( asynchronous: { (transaction) -> Void in let myimgs = try dataStack.fetchAll(From<MyImage>()) }, completion: { (result) -> Void in switch result { case .success: print("success!") case .failure(let error): print(error) } } ) }) The result is: <NSThread: 0x6000009f04c0>{number = 1, name = main} ❗ [CoreStore: Assertion Failure] DataStack+Querying.swift:146 fetchAll(_:_:) ↪︎ Attempted to fetch from a 'CoreStore.DataStack' outside the main thread. Can anyone assist? I'm using CoreStore 8.0.0, Xcode 12.4, Swift v5. I appreciate you help. Thanks, Brad
adam closed this issue 2025-12-29 18:26:07 +01:00
adam commented 2025-12-29 18:26:08 +01:00
Author
Owner
Copy Link
Copy Source

@JohnEstropia commented on GitHub (Jul 10, 2021):

You are just fetching objects so you shouldn't use dataDtack.perform()

Just call dataStack.fetchAll() and it should be fine

@JohnEstropia commented on GitHub (Jul 10, 2021): You are just fetching objects so you shouldn't use `dataDtack.perform()` Just call `dataStack.fetchAll()` and it should be fine
adam commented 2025-12-29 18:26:08 +01:00
Author
Owner
Copy Link
Copy Source

@bradleydworak commented on GitHub (Jul 10, 2021):

Thanks John for your prompt reply, indeed that worked.

@bradleydworak commented on GitHub (Jul 10, 2021): Thanks John for your prompt reply, indeed that worked.
Sign in to join this conversation.
No Branch/Tag Specified
Branches Tags
Labels
Clear labels
abandoned
corestore bug
discussion
duplicate
enhancement
fixed
fixed
help wanted
in progress
investigating
ios/compiler bug
irreproducible
looking for workarounds
not a bug
pending
pending docs update
pull-request
Mirrored from GitHub Pull Request
 question
regression
user bug
wontfix
No labels
Milestone
No items
No Milestone
Projects
Clear projects
No projects
Assignees
Clear assignees
adam (Adam Melkus)
No Assignees
1 Participants
Notifications
Due Date
No due date set.
Dependencies

No dependencies set.

Reference: starred/CoreStore-JohnEstropia#364