I'm trying to generate NSManagedModels from my datamodel. Generation works but after I got many errors :
error: filename "Station+CoreDataProperties.swift" used twice:
'/Users/Me/MyApp/Models/CoreData/Station+CoreDataProperties.swift' and
'/Users/Me/Library/Developer/Xcode/DerivedData/MyApp-gwacspwrsnabomertjnqfbuhjvwc/Build/Intermediates/MyApp.build/Debug-iphoneos/MyApp.build/DerivedSources/CoreDataGenerated/Model/Station+CoreDataProperties.swift'
:0: note: filenames are used to distinguish private
declarations with the same name
I try clean build folder and derivedData directory hard delete. I'm using Xcode 8 BETA maybe it's a bug ?
I get this in Xcode 8.1
For me following steps solved the issue. Please note that order matters.
1) Create entity in Core Data model.
2) Under class section, make settings as on following image.
Module: Current Product Name
Codegen: Manual/None
3) Generate your NSManagedObject subclass.
This post greatly helped me solve this problem myself. Personally I look at this as an Xcode bug. Bug or not this is a huge chicken and egg situation.
I ran into this by:
Created a new Project using Core Data
Generated my NSManagedObject subclass+extension (while codegen: ClassDefinition)
I accidentally saved the generated classes in the Wrong folder
I deleted the generated files
Re-generated in folder I wanted
đź’Ą- Xcode used twice errors
As others have posted I kept cleaning my build (and clean build folder) but that never fixed the build issue.
I finally figured out if you originally created your NSManagedObject generated classes with codegen: ClassDefinition, as I did without knowing then you are locked in for the chicken and egg issue.
I then deleted the auto generated classes thinking I had to re-generate, so I did. Once re-generated I would get the used twice build error again. I manually went into the ../DerivedSources/CoreDataGenerated/Model/.. and deleted the duplicates. Again, I re-generated thinking I'd only have 1 copy (in my project) but I was wrong. If codegen: ClassDefinition was originally set then Xcode will keep creating the auto-generated classes+extensions and put them in the buried folder ../DerivedSources/CoreDataGenerated/Model/... I repeated this chicken and egg a few times before catching on.
I later realized you do indeed need to mark codegen: Manual/None however to get things back in sync you need to delete the auto-generated files in ../DerivedSources/CoreDataGenerated/Model/.. and in your project if you have any there still.
Be careful setting codegen: Manual/None, for me it was bit tricky because codegen: Manual/None wouldn't stick. I had to click back and forth between entities multiple times to double/triple check each entity was set to codegen: Manual/None. Then auto generate the files. At this point your only copy of the auto generated files should be in your project and not in ../DerivedSources/CoreDataGenerated/Model/...
Last, I think this is a bug because if you specify codegen: Manual/None I don't expect Xcode to auto generate files at all, yet it does and puts them in your project. More confusing if your setting is codegen: ClassDefinition, who the heck knows Xcode will put the files in a buried directory yet it is available for use in your project. My beef with this is the auto generated files aren't source controlled and if I change computer I have to know to auto-generate them on the new station.
Hope this helps someone else!
Cheers!
This is indeed not a bug. As #Morrowless suggests both class definition and properties extension are created. If this is not wanted, select Manual/None under Codegen before generating the code. If the code is already generated, just delete them, and try Editor->Create NSManagedObject Subclass... again from the menu (after setting Manual/None).
Note, in the picture below, the Class Name 'Contact' is specific to my project. You will see your entity name instead.
If you generated CoreData subclasses with codegen: ClassDefinition your basically screwed. The only way to fix it is to:
Delete your CoreData subclasses.
Delete your derived data folder.
Clean your project (CMD+K).
Generate new CoreData subclasses, this time select Codegen: Manual/None and Module: Current Product Module
This is not a bug. Codegen generates these files in the DerivedData folder, so you don't need to create them again in your project, hence the compile error.
From Xcode 8.0 Release notes:
Xcode automatically generates classes or class extensions for the entities and properties in a Core Data data model. Automatic code generation is enabled and disabled on an entity by entity basis, and is enabled for all entities in new models that use the Xcode 8 file format. This feature is available for any data model that has been upgraded to the Xcode 8 format. You specify whether Xcode generates Swift or Objective-C code for a data model using the data model’s file inspector.
When automatic code generation is enabled for an entity, Xcode creates
either a class or class extension for the entity as specified in the
entity's inspector: the specified class name is used and the sources
are placed in the project’s Derived Data. For both Swift and
Objective-C, these classes are directly usable from the project’s
code. For Objective-C, an additional header file is created for all
generated entities in your model. The header file name conforms to the
naming convention “DataModelName+CoreDataModel.h”.
However, if you selected Category/Extension under the codegen pulldown menu in the data model inspector (because you want to add logic to your model): codegen will wrongly generate both the class definition and properties extension.
The solution is to simply delete the properties extension (ClassName+CoreDataProperties.swift). Your project should now compile.
After following the guidance from oyalhi and Vladimir Shutyuk, (deleting the NSManagedObject files, changing the entity codegen to Manual/None), I had to restart Xcode to allow it to index again before I could re-generate the NSManagedObject files and get a successful compile.
For the sake of completeness..:
I just ran into the same error, but none of the proposed solutions worked. What puzzled me was that even switching from automated code generation to manual for the one (as I thought) problematic entity didn't do anything.
Finally, I figured out that I had several entities with the same name, but they all shared the same classname. The reason for this was that I copy&pasted one entity several times to save me some work, because they also have a few attributes in common.
Turns out XCode renames the duplicates by adding 1, 2,... to the entity name, but leaves the class name as before. And since now entity name and class name are "unrelated", renaming the entity won't change the class name either.
Hope it helps someone - I have also filed a bug report for this.
Related
I had a working project in Android-Studio, including Databinding. That eleminates some possible sources of error. ;-)
Then I decided to get my feet wet with Kotlin and began to migrate some classes from Java to Kotlin.
Unfortunately I also klicked to update Android-Studio to 3.4 in the middle of this process. So now I have many moving parts ...
Now after some editing, when I try to compile my app, the databinding-classes are not generated any more. Usually this is a problem of missing getters or setters or something like this. But currently I have no compiler errors that indicate such problems. Only all the references to my BR. class are red as this class is not generated.
In the layout-files the getters and setters from the data-variable are not shown - so there is a problem already there.
The build-log tells me to check the log for details, but I can not find any log with error-messages that could lead to a solution.
Android-Studio 3.4, mixed Java/Kotlin sourcecode
Besides those missing BR class, I have no other compilation errors at the moment.
I checked the raw gradle output and also tried to run those steps with the more verbose output - no luck.
Maybe this is related:
- I also have problems to edit my existing layouts with constraint-views. Somehow the constraints are read-only.
After some fiddeling around I managed to get one layout back to read-write mode. Not shure what I did to accomplish this ...
- Also I have the problem that Android-Studio "remembers" the last project and mixes the configurations from the last project with that of the current one. To fix this I have to delete the .idea folder in the project ... After that I can work with my project until I change to another or open a second one in parallel ... :-/
In order to get logs I also changed to generate the binding-classes by the compiler instead on the fly by Android-Studio - no luck.
As this is an installation with some history, I also tried to delete the configuration-files from Android-Studio - also no luck.
Clean- and Rebuild Project, Restart Android-Studio, Invalidate Caches ... all that tried without success.
Currently I am out of ideas where to look. Maybe somebody out there has a tip for me?
if you use imports in xml like
<import type="java.lang.Integer"/>
you have to delete it because android studio is imported automatically.
ref :
Just as in managed code, java.lang.* is imported automatically.
Finally I found the source of my problems!
After many attempts to find an error in my code or maybe in Android-Studio (also downgraded to 3.3 and tried the current 3.5 canary version) I decided to strip down the code to the max.
So I created a new project. In that project I created 2 observable classes and copied the minimal code from https://developer.android.com/topic/libraries/data-binding/observability#observable_objects.
I created one class in java and one class in Kotlin (with an index-Number at the properties so that I could see which properties are generated in the BR class).
Only the properties from the Java-class were generated in the BR class, those from the Kotlin class were missing. No error messages besides the missing BR-properties were generated. :-(
With this information I started a new research and finally found, that for Kotlin currently the apply plugin: 'kotlin-kapt' was missing in the project build.gradle file.
Once I added this, also the properties from the Kotlin class were added to the BR class.
Some (older) articles also add kapt "com.android.databinding:compiler:x.x.x" to the dependencies, but with the latest compiler I got null-pointer exceptions. Seems that this component is already referenced somewhere else, because it is not necessary (any more).
I also added this to my other project and now those BR-properties are also present there. So I am confident to have found the answer to my question and can now focus on bugfixing my app.
I have an Android project (I'll update soon with the source once public) that has code in Kotlin.
When I try to import a class it shows on the auto-complete but then it does a full name reference instead of adding the reference to the class on the imports of the file. Also, when I try to do an import, there is no option to include the import to the class.
It's happened so far in two projects I've worked on. The first one had a mix of Java a Kotlin and I thought that may be the issue, however, the last one doesn't have any Java code.
The code is in the debug configuration. However, a file that is on the same package and folder as this one with the issue doesn't seem to have the same problem and imports work as expected.
Update after duplication suggestion
This was marked as a duplicate, but it's not for several reasons:
This one involves Kotlin and not Java
The reported problem was with project imports, this is a library (system) import
Tried the suggested solution and it doesn't solve this issue.
This one has a gif ^_^
Best what you can do it build new Empty Project and copy old classes and files on new project.
I am using Liferay 6.2 GA5 Community Edition.
Sample case I have 2 entities in my service.xml, let's say entity A & B.
When I run Service Builder then it will generate many JAVA files in my source code, and also generate JAR file located in
".\my-app\liferay-plugins-sdk-6.2\portlets\my-app-portlet\docroot\WEB-INF\lib\my-app-service.jar"
I open it with 7-zip, and I can see in package com.mycompany.myapp.model contains classes of entity A & B.
Then I try to remove entity A in service.xml, and I have removed the corresponding JAVA files generated in my source code, then I run Service Builder again, but inside my-app-service.jar, entity A is still exist.
How do I completely remove it from JAR file? because in my case, Service Builder will not remove it, although I have remove generated JAVA files manually.
ServiceBuilder is a code generator, thus it only generates new code.
If you want to get rid of the once generated code, there's a lot more than just the java classes to get rid of: Spring configuration, Hibernate configuration etc. are there as well for you to take care of. All of these will have to be deleted manually. And if the code still remains in the jar, good old ant clean (or whatever build environment you use) should get rid of the my-app-service.jar file (which you otherwise also can also just delete manually, so that it will be rebuilt next time a build process or ServiceBuilder runs)
I recommend searching for occurrences of A in all your project's files to see if you still find leftovers, because otherwise some component might complain at runtime that a declarated class can't be found.
I've began to try use Core data with swift 3 and Xcode 8 beta. When I try to generate NSManagedObject subclasses from core data model and Create NSManagedObject subclass… option in Editor menu, Xcode 8 beta generates three files one of them is _COREDATA_DATAMODELNAME_+CoreDataModel.swift with the following content:
import Foundation
import CoreData
___COREDATA_DATAMODEL_MANAGEDOBJECTCLASSES_IMPLEMENTATIONS___
In addition, the content of this file shows two warnings:
Expressions are not allowed at the top level.
Use of unresolved identifier '___COREDATA_DATAMODEL_MANAGEDOBJECTCLASSES_IMPLEMENTATIONS___'
Has anyones faced the same issue? Which is the meaning of this new file?
Thanks
It's probably a (beta) clash with the new automatic subclass generation, which can be controlled in the entity inspector of the data model file.
From the documentation (What's New In Core Data)
Xcode automatic subclass generation
Xcode now supports automatic generation of NSManagedObject subclasses
in the modeling tool. In the entity inspector:
Manual/None is the default, and previous behavior; in this case you
should implement your own subclass or use NSManagedObject.
Category/Extension generates a class extension in a file named like
ClassName+CoreDataGeneratedProperties. You need to declare/implement
the main class (if in Obj-C, via a header the extension can import
named ClassName.h). -
Class Definition generates subclass files named
like ClassName+CoreDataClass as well as the files generated for
Category/Extension.
The generated files are placed in DerivedData and
rebuilt on the first build after the model is saved. They are also
indexed by Xcode, so command-clicking on references and fast-opening
by filename works.
I have similar problems with this developer beta Xcode 8. Some of them resolved Command + S (save changes) before I leave Data Model or before I generate NSManagedObject subclasses. I don't know why but in my case automatic save didn't work sometimes and some errors occur.
I've run into the problem with the .swift file cited above and found that commenting out the ___COREDATA... line got me by the error for now. I'm not sure what it's supposed to accomplish.
I'm also finding that XCODE 8 has a tendency to forget about new fields that are added to CoreData entities and to repeatedly reset the CoreData model code generation target to Objective C, leading to a flurry of .h and .m files instead of swift files when it regenerates files. Most of the issues that I've seen have been CoreData related, but have been workable so far.
Other than that, XCODE 8 has been surprisingly solid working with an app with 25 data entities and over 30 view controllers so I'm not complaining.
Using Xcode 6 beta 4 Core Data, how do you regenerate the subclasses if you want to add/remove an Attribute?
For example, I create a new entity and add a few attributes then go to Editor > CreateNSManagedObjectSubclass.., it works the first time and creates the entity as a .swift file, but then if I go and add a new entity and try to regenerate the subclasses by choosing the same option in the editor menu it doesn't overwrite the .swift file with the new entity. This used to work for me in Xcode 5.
Does anyone know what I'm doing wrong or what is the correct way to do this?
Thanks!
Xcode won't silently overwrite your file. This is a feature, not a bug, because you will not inadvertently lose custom code in those classes.
If you want to replace the file, delete it first. The class generation will then work as expected.