sreyansjain

sreyansjain

Can LiveView push_event send only the latest event

Thanks to the awesome community we have here.

I have created a VueJs component using phx-hook. I have also used phx-update=“ignore” on the same component. The idea is to handle the user interaction using vuejs and exchange data using liveview. It works fine but there is an important issue.
When i am initialising the component in the update method of the live_component i do this

    {:ok,
     push_event(socket, "table_data_init", %{
       columns: cols,
       rows: rs,
       data: data,
       block_id: block_id,
       members: socket.assigns.members,
       doc_members: socket.assigns.doc_members
     })}

In the hook I am listening to these events like so -

    this.handleEvent("table_data_init", (data) => {
      console.log(data.block_id)
      vue_table['b' + data.block_id].data = data
    })
    this.handleEvent("table_data_updated", (payload) => {
      let new_data = payload.data
      let data = vue_table['b' + new_data.block_id].data
      if (data.rows){
        data.rows = data.rows.map((r) => {
          if(r.id == new_data.row_id){
            r.modified_by = new_data.user_id
          }
          return r
        })

        let dp = data.data.filter((d) => d.table_column_id == new_data.col_id && d.table_row_id == new_data.row_id)
        if(dp.length == 1){
          data.data = data.data.map((d) => {
            if(d.table_column_id == new_data.col_id && d.table_row_id == new_data.row_id){
              d.value = new_data.value
            }
            return d
          })
        }else{
          let d = {
            table_column_id: new_data.col_id,
            table_row_id: new_data.row_id,
            value: new_data.value
          }
          let x = [...data.data, d]
          data.data = x
        }
      }
    })
    this.handleEvent("table_columns_updated", ({columns, block_id}) => {
      vue_table['b' + block_id].data.columns = columns;
    })
    this.handleEvent("table_column_deleted", ({columns, data, block_id}) => {
      vue_table['b' + block_id].data.columns = columns;
      vue_table['b' + block_id].data.data = data;
    })
    this.handleEvent("new_table_row_added", ({rows, block_id}) => {
      console.log("***********************************************")
      vue_table['b' + block_id].data.rows = rows;
      vue_table['b' + block_id].current_page = vue_table['b' + block_id].total_pages 
    })

Now the problem is when I make first request to liveview from the vuejs component using the hook -

this.pushEventTo(target, "event_name", {data: data})

I get a response from liveview which has 2 event calls, the table_data_init and the new one table_data_updated.

If i send another event from the vuejs component, I get reply from liveview which has 3 events. Like so -

This keeps repeating. So for 10th event I get a reply with 11 events and so on.

Can I prevent this? Can we make live_view send only the latest event and not all the events during the editing session?

Any help would be deeply appreciated.
Thanks to the community once again.

Marked As Solved

josevalim

josevalim

Creator of Elixir

Fixed in master!

Also Liked

josevalim

josevalim

Creator of Elixir

It is a bug. I found the root cause looking at the code, I will push a fix soon.

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