C# : Set a default value for MFIdentifier in Configuration

You can mark the value as not mandatory: Editors (m-files.com)

I see two problem doing that : 

- the value is mandatory

- the left side of the editor will still show "property definition" instead of the real property name.

The value isn't mandatory within the configuration, though.  The value is mandatory at runtime, but this attribute isn't checking that; it's checking whether the value exists in the JSON configuration.

Within your application you should be checking the runtime value to see that it's resolved (e.g. "if(false == this. Configuration.mfIdPropActeur.IsResolved)").  You can do this both when your methods run and also by providing additional Custom Configuration Validation (m-files.com)configuration validation.

I do see the argument that the mapping could/should show the property name if one matches the alias you're providing, but it currently does not unless an explicit value is added.

You are right, I will write a custom validator instead of using the "required" tag.

I am a little disappointed it is not that straightforward sometimes, I was really hoping the property properly shown in the configuration if the default one is in the code.

Thanks.

Hello,

I have additional issues. When I first deploy my app, all the datamember are red in the admin, but raise no error.

But if I complete one and save, then all the oters are now in error.

They are declared like that: 

[DataMember]
[MFPropertyDef]
[JsonConfEditor(DefaultValue = "M-Files.UserSynchronization.Email")]
public MFIdentifier mfIdPropEmail = "M-Files.UserSynchronization.Email";

[DataMember]
[MFPropertyDef]
[JsonConfEditor(DefaultValue = "PD.EtapeAvant")]
public MFIdentifier mfIdPropEtapeAvant = "PD.EtapeAvant";

[DataMember]
[MFPropertyDef]
[JsonConfEditor(DefaultValue = "PD.Coexya.Service")]
public MFIdentifier mfIdPropService = "PD.Coexya.Service";

[...]

Adding a "(Validate = false)" tag change nothing....

How to make a proper configuration in this case?

I juste want to show the alias with default values and be able to some of them if necessary.

Thank you

In the example I linked to earlier, it showed how to make one property optional.  You don't seem to have used the AllowEmpty property that the example does.

Editors (m-files.com)

What a fast answer !

I am sorry for missing that, I was reluctant to use that tag because it allow the user to put nothing then save... But that's better than errors.

I have another question about this. What does this tag do?

I didn't really understood.

amaury.bianchi said:

I am sorry for missing that, I was reluctant to use that tag because it allow the user to put nothing then save... But that's better than errors.

But that's the reason why you validate your configuration at runtime.

The attribute you linked to is part of the dotnet BCL, not directly related to VAF development: DataMemberAttribute Class (System.Runtime.Serialization) | Microsoft Learn

It is used to define that a member should be serialized to the serialized representation (JSON, in this case) of the object.  There's more information on what it does in the documentation.