Third Party Unity - Mirror : Using SyncDictionary

I am using Unity with Mirror Networking and I have a SyncDictionary but I can't fill it in client side even if I send a command. Do someone can help me please ?

Thanks a lot for answers !

The SyncDictionary and a callback method :

Code (CSharp):

1. public class PlayerEquipmentManager : NetworkBehaviour
2. {
3.    public SyncDictionary<string, int> playersMasks = new SyncDictionary<string, int>();
4.  
5.    public void OnAddMask(SyncDictionary<string, int>.Operation op, string key, int value)
6.    {
7.       if(op == SyncIDictionary<string, int>.Operation.OP_ADD)
8.       {
9.          Debug.Log("key : " + key + "\tvalue : " + value.ToString());
10.       }
11.    }

The method for adding entry in my SyncDictionary :

Code (CSharp):

1. public class PlayerBehaviour : NetworkBehaviour
2. {
3.    [Command]
4.    public void AddPlayerMasks(int maskID)
5.    {
6.       PlayerEquipmentManager equipmentManager = GameObject.Find("PlayerEquipmentManager").GetComponent<PlayerEquipmentManager>();
7.       string username = PlayerPrefs.GetString("username");
8.       if (equipmentManager.playersMasks.ContainsKey(username))
9.       {
10.          equipmentManager.playersMasks[username] = maskID;
11.       }
12.       else
13.       {
14.          equipmentManager.playersMasks.Add(username, maskID);
15.       }
16.       equipmentManager.playersMasks.Callback += equipmentManager.OnAddMask;
17.    }

 

Iirc server cannot receive callbacks on syncvar, dictionary, ect changes. You're listening for a callback on the server so that's possibly one issue.

Second, you're subscribing to the callback AFTER setting data which means it won't occur until after the next entry is added.

Last, it's wasteful to check contains first, just assign the value using xyz[ABC] = blah.

 

Thanks, I fixed all things. I moved the callback subscription but out of my command but it still doesn't work.
I'm not sure about your first point because on host side, I can receive the callback but not on client side. It's as if the command was not called.

 

Move the callback subscription changed nothing. It's as if the command was not called.

 

I call the button when I'm pushing a button in canvas dedicated to customize my character. The script is attached to the canvas.

Code (CSharp):

1.    public void ValidateChoosenMask()
2.    {
3.       PlayerEquipmentManager equipmentManager = GameObject.FindGameObjectWithTag("PlayerEquipmentManager").GetComponent<PlayerEquipmentManager>();
4.       equipmentManager.SetMasksList(masks);
5.       PlayerBehaviour playerBehaviour = player.GetComponent<PlayerBehaviour>();
6.       playerBehaviour.AddPlayerMasks(maskIdx); //calling the command
7. }

 

It' doesn't work.

 

How you're adding it should be okay. But how do you know with certainty it's not being added?

 

Good question. I didn't mention it. When I search the key in the dictionary, it's not found.
I got an error message :

Code (CSharp):

1. KeyNotFoundException: The given key 'client' was not present in the dictionary.

Moreover, on host side, when I filled the dictionary, the callback function logged the objects.
It didn't on client side.

 

The callback will only occur if you subscribe to it client side. Try subscribing in Awake. If you don't get the callback then and the data is populating on host try a simple syncvar. If the syncvar works I'd say it's possibly a bug.

 

I tried subscribing in awake and I can see when the host add something in the syncdictionary but I still have the error messages when I search for the added from client side.
I have other variables using syncvar and they work well so maybe it's a bug.

 

The error could occur if you are searching before the data arrives over the network. But if you aren't getting the callback and the data NEVER arrives, and with other syncvars working I'd say chances of it being a bug are plausible.