How can I map <c-j> to be completion instead of snippet

[AceCodePt]

Contributing guidelines

• I have read CODE_OF_CONDUCT.md

Module(s)

mini.completion, mini.snippets

Question

I tried to have the mini completion work together and be toggled on
However even after overriding the mapping is hijacked by snippets.
After pressing I'm met with ->

(mini.snippets) No snippets in context:
{
   buf_id = 2,
   lang = "lua"
}

Here is my config with lazy and mini:

	{
		"echasnovski/mini.completion",
		version = "*",
		dependencies = {
			{
				"echasnovski/mini.snippets",
				version = "*",
				opts = function(mod)
					local gen_loader = require(mod.name).gen_loader
					return {
						{
							-- Array of snippets and loaders (see |MiniSnippets.config| for details).
							-- Nothing is defined by default. Add manually to have snippets to match.
							snippets = {
								-- gen_loader.from_file("~/.config/nvim/snippets/package.json"),
								gen_loader.from_lang(),
							},

							-- Module mappings. Use `''` (empty string) to disable one.
							mappings = { expand = "", jump_next = "", jump_prev = "" },

							-- Functions describing snippet expansion. If `nil`, default values
							-- are `MiniSnippets.default_<field>()`.
							expand = {
								-- Resolve raw config snippets at context
								prepare = nil,
								-- Match resolved snippets at cursor position
								match = nil,
								-- Possibly choose among matched snippets
								select = nil,
								-- Insert selected snippet
								insert = nil,
							},
						},
					}
				end,
			},
		},
		keys = {
			{ "<C-j>", "<C-n>", mode = { "i" }, expr = false },
			{ "<C-k>", "<C-p>", mode = { "i" }, expr = false },
		},
		opts = {
			-- Delay (debounce type, in ms) between certain Neovim event and action.
			-- This can be used to (virtually) disable certain automatic actions by
			-- setting very high delay time (like 10^7).
			delay = { completion = 100, info = 100, signature = 50 },

			-- Configuration for action windows:
			-- - `height` and `width` are maximum dimensions.
			-- - `border` defines border (as in `nvim_open_win()`; default "single").
			window = {
				info = { height = 25, width = 80, border = nil },
				signature = { height = 25, width = 80, border = nil },
			},

			-- Way of how module does LSP completion
			lsp_completion = {
				-- `source_func` should be one of 'completefunc' or 'omnifunc'.
				source_func = "completefunc",

				-- `auto_setup` should be boolean indicating if LSP completion is set up
				-- on every `BufEnter` event.
				auto_setup = true,

				-- A function which takes LSP 'textDocument/completion' response items
				-- (each with `client_id` field for item's server) and word to complete.
				-- Output should be a table of the same nature as input. Common use case
				-- is custom filter/sort. Default: `default_process_items`
				process_items = nil,

				-- A function which takes a snippet as string and inserts it at cursor.
				-- Default: `default_snippet_insert` which tries to use 'mini.snippets'
				-- and falls back to `vim.snippet.expand` (on Neovim>=0.10).
				snippet_insert = nil,
			},

			-- Fallback action as function/string. Executed in Insert mode.
			-- To use built-in completion (`:h ins-completion`), set its mapping as
			-- string. Example: set '<C-x><C-l>' for 'whole lines' completion.
			fallback_action = "<C-n>",

			-- Module mappings. Use `''` (empty string) to disable one. Some of them
			-- might conflict with system mappings.
			mappings = {
				-- Force two-step/fallback completions
				force_twostep = "<C-Space>",
				force_fallback = "<A-Space>",

				-- Scroll info/signature window down/up. When overriding, check for
				-- conflicts with built-in keys for popup menu (like `<C-u>`/`<C-o>`
				-- for 'completefunc'/'omnifunc' source function; or `<C-n>`/`<C-p>`).
				scroll_down = "<C-f>",
				scroll_up = "<C-b>",
			},
		},
	},

[echasnovski]

The mappings = { expand = "", jump_next = "", jump_prev = "" } is indeed the correct way to have 'mini.snippets' not automatically create its mappings (including default <C-j> for to expand mappings).

It looks like the opts function for 'mini.snippets' config returns incorrect data: it returns { { ..., mappings = {} } } (i.e. array with single config element) when it should return config table directly. Remove extra { / } nesting and it should work.

And if you want <C-j> to have 'mini.completion' force its completion, set force_twostep = "<C-j>".

[AceCodePt]

@echasnovski Thanks!
That was it.