method textDocument/completion is not supported by any of the servers registered for the current buffer

[jotacosta-fb]

I'm running completion module successfully. However, if I am editing a filetype that has servers but where those servers do not have completion, I keep getting this message:

method textDocument/completion is not supported by any of the servers registered for the current buffer

This is correct, but how do I silence this?

For example: when I'm editing a fish shell script with null-ls for formatting, I know I don't have completion. This makes it almost impossible to edit the script as it pop-up frequently.

[echasnovski]

Well, that shouldn't happen. I have only 'null-ls' formatting set up for markdown files and it works as expected - always uses fallback completion. Does this happen only with fish shell script files?

Could you please run :lua require('mini.misc').put_text(vim.lsp.get_active_clients({ bufnr = 0 })) in buffer where you are getting this behavior and post the output lines here? Don't forget to replace any absolute paths from output (like root directory, etc.).

[jotacosta-fb]

Just tested - it happens to me on json files too. I wonder if I miss something on the module configuration. I am using the default require('mini.completion').setup {}

[echasnovski]

Aha, thanks to this I was able to reproduce. The reason this doesn't happen in my setup is because I manually set function on attach of every LSP server that happen to have completion capability. This shouldn't be the case and I'll try to fix this tomorrow.

In the meantime here is what should work as (temporary or permanent) solution:

• Use this 'mini.completion' setup:

require('mini.completion').setup({
  lsp_completion = { source_func = 'omnifunc', auto_setup = false },
})

• Manually set appropriate omnifunc on attach every server you would like to have completion. Here is how I do it (with this usage). I generally recommend this approach.

[jotacosta-fb]

I have almost the same setup. Was super easy to just adopt your solution.

Thanks!

[jotacosta-fb]

{ {
    _on_attach = <function 1>,
    attached_buffers = { true },
    cancel_request = <function 2>,
    commands = {},
    config = {
      cmd = { "nvim" },
      filetypes = { "python", "vim", "fish", "lua", "markdown", "yaml", "html", "json", "sh", "zsh" },
      flags = {
        debounce_text_changes = 250
      },
      get_language_id = <function 3>,
      name = "null-ls",
      on_attach = <function 4>,
      on_exit = <function 5>,
      on_init = <function 6>,
      root_dir = "/Users/jotacosta",
      settings = {}
    },
    handlers = {},
    id = 1,
    initialized = true,
    is_stopped = <function 7>,
    messages = {
      messages = {},
      name = "null-ls",
      progress = {},
      status = {}
    },
    name = "null-ls",
    notify = <function 8>,
    offset_encoding = "utf-16",
    request = <function 9>,
    request_sync = <function 10>,
    requests = {},
    rpc = {
      handle = {
        is_closing = <function 11>,
        kill = <function 12>
      },
      notify = <function 13>,
      pid = 5001,
      request = <function 14>
    },
    server_capabilities = {
      codeActionProvider = {
        resolveProvider = false
      },
      completionProvider = {
        allCommitCharacters = {},
        completionItem = {
          labelDetailsSupport = true
        },
        resolveProvider = false,
        triggerCharacters = { ".", ":", "-" }
      },
      documentFormattingProvider = true,
      documentRangeFormattingProvider = true,
      executeCommandProvider = true,
      hoverProvider = true,
      textDocumentSync = {
        change = 1,
        openClose = true,
        save = {
          includeText = true
        }
      }
    },
    stop = <function 15>,
    supports_method = <function 16>,
    workspaceFolders = <1>{ {
        name = "/Users/jotacosta",
        uri = "file:///Users/jotacosta"
      } },
    workspace_folders = <table 1>,
    <metatable> = {
      __index = <function 17>
    }
  } }

[echasnovski]

Yeah, it almost same as mine. Not an issue, though. See this comment.

[echasnovski]

So, as far as I can tell, this output (and the one I have as well) tells that this particular LSP server should support completion, because there is a non-nil server_capabilities.completionProvider element. Here is the source of supposedly canonical way of checking if this. The completionProvider is checked for textDocument/completion based on this table entry from Neovim core.

So I am not sure what to do here, as at the moment it feels like an issue with 'null-ls', but it might as well be its intended behavior.