refactor: dedupe marimo dropdown and connection helpers

examples/demo.py

@@ -35,49 +35,66 @@ def _(hm, mo, os):
 @app.cell
 def _(hm, workspace):
     client = workspace.client
-    status = hm.connection_status(client)
+    status = hm.connections_panel(client)
     browser = hm.table_browser(client)
     editor = hm.sql_editor(
         client,
         default_sql="SELECT 1 AS ok",
     )
     recent = hm.recent_results(client, limit=20)
     history = hm.run_history(client, limit=10)
-    return browser, client, editor, history, recent, status, workspace
+    return browser, client, editor, history, recent, status
 
 
 @app.cell
-def _(browser, editor, mo, recent, status, workspace):
-    return mo.vstack(
-        [
-            workspace.ui,
-            status,
-            browser.ui,
-            editor.ui,
-            recent.ui,
-        ],
-        gap=2,
-    )
+def _(mo):
+    mo.md(r"""
+    ## HotData explorer
+    Use the tabs below to switch between available workspaces, connection status, dataset browsing, and SQL queries.
+    """)
+    return
+
+
+@app.cell
+def _(browser):
+    # Register connection/table widget deps so Marimo reruns layout cells on change.
+    if browser._conn_pick is not None:
+        _ = browser._conn_pick.value
+    _ = browser.table_pick.value
+    return
 
 
 @app.cell
-def _(history):
-    return history
+def _(browser):
+    return (browser.ui,)
 
 
 @app.cell
-def _(editor, hm):
+def _(browser_ui, editor, history, mo, recent, status, workspace):
+    mo.ui.tabs({
+        "Workspaces": workspace.ui,
+        "Connections": status,
+        "Datasets": browser_ui,
+        "SQL query": editor.ui,
+        "Recent results": recent.ui,
+        "Run history": history,
+    })
+    return
+
+
+@app.cell
+def _(editor):
     # Explicitly touch nested widget values so Marimo reruns this cell on clicks.
     _run = editor.run.value
     _rerun = editor.rerun.value
     _clear = editor.clear.value
-    return hm.query_result(editor.result), _clear, _rerun, _run
+    return
 
 
 @app.cell
-def _(hm, recent):
+def _(recent):
     _selected = recent.pick.value
-    return hm.query_result(recent.result, label="Recent result"), _selected
+    return
 
 
 @app.cell

hotdata_marimo/__init__.py

@@ -12,6 +12,7 @@
 from hotdata_marimo.display import (
     RecentResults,
     connection_status,
+    connections_panel,
     query_result,
     recent_results,
     run_history,
@@ -36,6 +37,7 @@
     "WorkspaceSelector",
     "connection_picker",
     "connection_status",
+    "connections_panel",
     "from_env",
     "hotdata_connection_picker",
     "hotdata_query_result",

hotdata_marimo/_options.py

@@ -0,0 +1,107 @@
+"""Shared dropdown option helpers for Marimo UI widgets."""
+
+from __future__ import annotations
+
+from collections.abc import Callable
+from typing import Any
+
+import marimo as mo
+
+from hotdata_runtime import HotdataClient
+
+
+def unique_label_options(
+    pairs: list[tuple[str, str]],
+    *,
+    disambiguate: Callable[[str, str, int], str] | None = None,
+) -> dict[str, str]:
+    """Build a label→value map, suffixing repeated labels when needed."""
+    counts: dict[str, int] = {}
+    options: dict[str, str] = {}
+    for label, value in pairs:
+        count = counts.get(label, 0)
+        counts[label] = count + 1
+        if count == 0:
+            key = label
+        elif disambiguate is not None:
+            key = disambiguate(label, value, count)
+        else:
+            key = f"{label} ({count + 1})"
+        options[key] = value
+    return options
+
+
+def empty_dropdown(
+    *,
+    label: str,
+    message: str,
+    full_width: bool = True,
+):
+    return mo.ui.dropdown(
+        options={message: ""},
+        label=label,
+        full_width=full_width,
+    )
+
+
+def connection_options(conns: list[Any]) -> dict[str, str]:
+    pairs = [(str(c.name), str(c.id)) for c in conns]
+    return unique_label_options(
+        pairs,
+        disambiguate=lambda label, value, count: f"{label} ({value})",
+    )
+
+
+def connection_picker_from_connections(
+    conns: list[Any],
+    *,
+    label: str = "Connection",
+    full_width: bool = True,
+):
+    if not conns:
+        return empty_dropdown(
+            label=label,
+            message="(no connections)",
+            full_width=full_width,
+        )
+    return mo.ui.dropdown(
+        options=connection_options(conns),
+        label=label,
+        full_width=full_width,
+    )
+
+
+def connection_picker(
+    client: HotdataClient,
+    *,
+    label: str = "Connection",
+    full_width: bool = True,
+):
+    conns = client.connections().list_connections().connections
+    return connection_picker_from_connections(
+        conns,
+        label=label,
+        full_width=full_width,
+    )
+
+
+def resolve_connection_picker(
+    client: HotdataClient,
+    *,
+    label: str = "Connection",
+    full_width: bool = True,
+) -> tuple[Any | None, str | None]:
+    """Return ``(dropdown_or_none, implicit_connection_id)`` for table browsers."""
+    conns = client.connections().list_connections().connections
+    if not conns:
+        return None, ""
+    if len(conns) == 1:
+        return None, conns[0].id
+    return (
+        connection_picker_from_connections(
+            conns,
+            label=label,
+            full_width=full_width,
+        ),
+        None,
+    )

hotdata_marimo/display.py

@@ -6,18 +6,7 @@
 
 from hotdata_runtime import HotdataClient, QueryResult, workspace_health_lines
 
-
-def _option_map_with_unique_labels(
-    pairs: list[tuple[str, str]],
-) -> dict[str, str]:
-    counts: dict[str, int] = {}
-    options: dict[str, str] = {}
-    for label, value in pairs:
-        count = counts.get(label, 0)
-        counts[label] = count + 1
-        key = label if count == 0 else f"{label} ({count + 1})"
-        options[key] = value
-    return options
+from hotdata_marimo._options import empty_dropdown, unique_label_options
 
 
 def query_result(
@@ -76,11 +65,15 @@ def __init__(self, client: HotdataClient, *, limit: int = 50) -> None:
             (f"{r.created_at} · {r.status} · {r.result_id}", r.result_id)
             for r in self._results
         ]
-        options = _option_map_with_unique_labels(option_pairs)
-        self.pick = mo.ui.dropdown(
-            options=options or {"(no results)": ""},
-            label="Recent results",
-            full_width=True,
+        options = unique_label_options(option_pairs)
+        self.pick = (
+            empty_dropdown(label="Recent results", message="(no results)")
+            if not options
+            else mo.ui.dropdown(
+                options=options,
+                label="Recent results",
+                full_width=True,
+            )
         )
 
     @property
@@ -150,3 +143,34 @@ def connection_status(client: HotdataClient):
         mo.md(f"**API** error — {parts[0]}"),
         kind="danger",
     )
+
+
+def connections_panel(client: HotdataClient):
+    """Workspace health callout plus a table of configured connections."""
+    status = connection_status(client)
+    conns = client.connections().list_connections().connections
+    if not conns:
+        return mo.vstack([status, mo.md("_No connections in this workspace._")], gap=1)
+    rows: list[dict[str, object]] = []
+    for c in conns:
+        rows.append(
+            {
+                "name": c.name,
+                "id": c.id,
+                "source_type": getattr(c, "source_type", None),
+            }
+        )
+    return mo.vstack(
+        [
+            status,
+            mo.ui.table(
+                rows,
+                label="Connections",
+                pagination=True,
+                page_size=min(10, len(rows)),
+                selection=None,
+                max_height=320,
+            ),
+        ],
+        gap=1,
+    )

hotdata_marimo/sql_engine.py

@@ -40,7 +40,6 @@ def __init__(
     ) -> None:
         super().__init__(connection, engine_name)
         self._connections_cache: list[Any] | None = None
-        self._connection_id_cache: dict[str, str] | None = None
 
     @property
     def source(self) -> str:
@@ -71,15 +70,12 @@ def _resolve_should_auto_discover(
             return True
         return value
 
-    def _connection_ids(self) -> dict[str, str]:
-        if self._connection_id_cache is None:
-            self._connection_id_cache = {
-                str(c.name): str(c.id) for c in self._connections()
-            }
-        return self._connection_id_cache
-
     def _connection_id(self, connection_name: str) -> str | None:
-        return self._connection_ids().get(connection_name)
+        try:
+            return self._connection.connection_id_by_name().get(connection_name)
+        except RuntimeError as e:
+            LOGGER.warning("%s", e)
+            return None
 
     def _connections(self) -> list[Any]:
         if self._connections_cache is None: