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[Android] Firestore: System.ArgumentException: Object of type 'System.Double' cannot be converted to type 'System.Single'

See original GitHub issue

Hi @TobiasBuchholz, I am currently testing your library on my Android app, and there’s actually an error when reading an existing document from the DataBase using : documentSnapshot.Data

IDocumentSnapshot<T> documentSnapshot = await documentReference.GetDocumentSnapshotAsync<T>();
if (documentSnapshot?.Data != null) // <---- System.ArgumentException occuring here
{
    return documentSnapshot.Data;
}
else
{
    throw new Exception("DOCUMENT NOT FOUND");
}

StackTrace

System.ArgumentException: Object of type 'System.Double' cannot be converted to type 'System.Single'.
  at System.RuntimeType.CheckValue (System.Object value, System.Reflection.Binder binder, System.Globalization.CultureInfo culture, System.Reflection.BindingFlags invokeAttr) [0x00056] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/ReferenceSources/RuntimeType.cs:201 
  at System.Reflection.RuntimeMethodInfo.ConvertValues (System.Reflection.Binder binder, System.Object[] args, System.Reflection.ParameterInfo[] pinfo, System.Globalization.CultureInfo culture, System.Reflection.BindingFlags invokeAttr) [0x00069] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Reflection/RuntimeMethodInfo.cs:454 
  at System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00040] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Reflection/RuntimeMethodInfo.cs:385 
  at System.Reflection.RuntimePropertyInfo.SetValue (System.Object obj, System.Object value, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] index, System.Globalization.CultureInfo culture) [0x0005d] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Reflection/RuntimePropertyInfo.cs:469 
  at System.Reflection.PropertyInfo.SetValue (System.Object obj, System.Object value, System.Object[] index) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/CoreLib/System/Reflection/PropertyInfo.cs:57 
  at System.Reflection.PropertyInfo.SetValue (System.Object obj, System.Object value) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/CoreLib/System/Reflection/PropertyInfo.cs:54 
  at Plugin.Firebase.Android.Extensions.JavaObjectExtensions.Cast (System.Collections.IDictionary this, System.Type targetType, System.String documentId) [0x000b4] in <becdb5103fb14132a70e7e52fa7d7747>:0 
  at Plugin.Firebase.Android.Extensions.JavaObjectExtensions.Cast[T] (System.Collections.Generic.IDictionary`2[TKey,TValue] this, System.String documentId) [0x00000] in <becdb5103fb14132a70e7e52fa7d7747>:0 
  at Plugin.Firebase.Android.Firestore.DocumentSnapshotWrapper`1[T].get_Data () [0x00023] in <becdb5103fb14132a70e7e52fa7d7747>:0

Setup

Visual Studio Community 2022 for Mac (17.0.7) Xamarin.Android (12.3.3.3) Xamarin.Forms (5.0.0.2012) Plugin.Firebase V1.1.2

Context

I guess it’s the IDocumentReference field that is causing the issue. Indeed, no issue is raised after removing the properties of type IDocumentReference from my document model. Could you please have a look ? Thanks in advance for your help 🙏

Issue Analytics

State:
Created a year ago
Reactions:1
Comments:5 (5 by maintainers)

Top GitHub Comments

1reaction

TobiasBuchholzcommented, Aug 22, 2022

Thanks for the pinpointing @Kapusch! I’ve created a fix and committed it to the development branch.

1reaction

TobiasBuchholzcommented, Aug 17, 2022

Hi @Kapusch, is it possible for you to show some code, e.g. the class that is the snapshots data type? It would also be interesting to see how this object is represented in the firestore database at the firebase console, could you mabe take a screenshot?

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