Cannot read property 'project' of undefined

[mirogrg1]

I keep getting this on any XAML page. I didn't have issues before with the same pages. Not sure changed but the logs are a bit cryptic:

{"processingIssue":true,"issueType":"error","position":null,"area":"Xaml","scope":"Req","error":{"name":"TypeError","message":"Cannot read property 'project' of undefined","stack":"TypeError: Cannot read property 'project' of undefined\n at Object.result.collectLanguages (C:\Users\MirosHPLaptop\AppData\Local\Programs\Gorilla Player\1.2.2\resources\DependencyManager.js.jx:1472:35)\n at Object.result.processResxUsage (C:\Users\MirosHPLaptop\AppData\Local\Programs\Gorilla Player\1.2.2\resources\DependencyManager.js.jx:1409:71)\n at Object.result.processXamlObject (C:\Users\MirosHPLaptop\AppData\Local\Programs\Gorilla Player\1.2.2\resources\DependencyManager.js.jx:194:33)\n at Object. (C:\Users\MirosHPLaptop\AppData\Local\Programs\Gorilla Player\1.2.2\resources\DependencyManager.js.jx:140:26)\n at Object. (C:\Users\MirosHPLaptop\AppData\Local\Programs\Gorilla Player\1.2.2\resources\XamlStore.js.jx:34:25)\n at Object.tryCatcher (C:\Users\MirosHPLaptop\AppData\Local\Programs\Gorilla Player\1.2.2\resources\node_modules\bluebird\js\main\util.js.jx:25:23)\n at Promise._settlePromiseFromHandler (C:\Users\MirosHPLaptop\AppData\Local\Programs\Gorilla Player\1.2.2\resources\node_modules\bluebird\js\main\promise.js.jx:509:31)\n at Promise._settlePromiseAt (C:\Users\MirosHPLaptop\AppData\Local\Programs\Gorilla Player\1.2.2\resources\node_modules\bluebird\js\main\promise.js.jx:583:18)\n at Async._drainQueue (C:\Users\MirosHPLaptop\AppData\Local\Programs\Gorilla Player\1.2.2\resources\node_modules\bluebird\js\main\async.js.jx:127:12)\n at Async._drainQueues (C:\Users\MirosHPLaptop\AppData\Local\Programs\Gorilla Player\1.2.2\resources\node_modules\bluebird\js\main\async.js.jx:132:10)\n at Async.drainQueues (C:\Users\MirosHPLaptop\AppData\Local\Programs\Gorilla Player\1.2.2\resources\node_modules\bluebird\js\main\async.js.jx:14:14)\n at process._tickCallback (node.js:803:1)"},"contextInstanceId":8,"targetId":4,"sampleDataId":2,"level":"error","message":"Xaml processing error Summary:\"Error loading DashboardWithImagesPage.xaml (Target XAML).\"; Message:\"Error occurred while loading C:\Users\MirosHPLaptop\Source\Repos\Trellise\Trellise\Trellise\Views\Dashboards\DashboardWithImagesPage.xaml (error message: Cannot read property 'project' of undefined).\"","timestamp":"2018-08-05T15:34:13.782Z"}

[salgiza]

@mirogrg1 , did you find what was causing the problem? I just tried to include Gorilla Player in one of our projects and I'm stuck with this error.

[mirogrg1]

@salgiza I can't exactly remember but the error was only happening on pages that were using strings from App.Resources.resx file. Then I think I played around with that file and changed the AppResources class to be public. You can do that by right clicking on AppResources.resx file and selecting PublicResXFileCodeGenerator for CustomTool property.

I did reset my emulator a few times at the time but not sure if that was part of the solution.

[salgiza]

Yep, it definitely has something to do with the translations, but I don't know why.

This is my Gorilla.json file:

{
    "navigationPage": {
        "all": true
    },
    "localization": {
        "markupExtension": {
            "name": "TranslateExtension",
            "namespace": "MyApp.Helpers",
            "assembly": "MyApp",
            "keyPropertyName": "Text"
        },

        "resources": {
            "resourceId": "MyApp.Resources.MyAppStrings",
            "assembly": "MyApp",
            "defaultCulture": "es"
        }
    }
}

If configured as that, I get the "Cannot read property 'project' of undefined" error. If I change the name of the markupExtension tag into something different (such as "xxx"), the error goes away, and the TranslateExtension actually is applied (so I get the translations, which is not bad), but it would be nice to be able to use the option to change between Translations in Gorilla Player.

I tried to play with the resx and downloaded the project in a Windows machine to be update the designer.cs file (I'm using Visual Studio for Mac, so I don't have a resx editor), but it did little difference.

Any ideas?

FWIW, I'm using the TranslateExtension as defined in the Xamarin docs:

using System; using System.Reflection; using System.Resources; using Xamarin.Forms; using Xamarin.Forms.Xaml;

namespace MyApp.Helpers
{
    [ContentProperty("Text")]
    public class TranslateExtension : IMarkupExtension
    {
        const string ResourceId = "MyApp.Resources.MyAppStrings";

        private static readonly Lazy<ResourceManager> ResMgr = new Lazy<ResourceManager>(() => new ResourceManager(ResourceId, typeof(TranslateExtension).GetTypeInfo().Assembly));

        public string Text { get; set; }

        public object ProvideValue(IServiceProvider serviceProvider)
        {
            if (Text == null)
                return "";

            ResourceManager resmgr = new ResourceManager(ResourceId, typeof(TranslateExtension).GetTypeInfo().Assembly);

            var translation = resmgr.GetString(Text, Warehouse.Settings.ActiveCultureInfo);

            if (translation == null)
            {
                translation = Text;
            }
            return translation;
        }

    }
}

[mirogrg1]

How about your DesignTimeData.son file? Does it have all the data for the page you're previewing?

[thegeox]

Did you find the solution for this. I am facing the same problem.

[salgiza]

@thegeox On my part, I finally gave up on using Gorilla Player. This was just one of several issues when trying to use it in a pre-existing project.

I'm waiting for Hot Reload to be released, to see if we have a bit more luck with that.