Print only the document fields there are

`list` does not load content, which is where the docling blobs live, so the
`content:` header announced a field the command declined to fetch. A document
without a uri or metadata printed `uri: None` and `meta: {}`, where `title`
was already omitted when absent.

haiku_rag_slim/haiku/rag/app.py

@@ -855,22 +855,22 @@ class HaikuRAGApp:
             content = Markdown(content)
         else:
             content = Markdown(doc.content)
-        title_part = (
-            f" [repr.attrib_name]title[/repr.attrib_name]: {doc.title}"
-            if doc.title
-            else ""
-        )
-        self.console.print(
-            f"[repr.attrib_name]id[/repr.attrib_name]: {doc.id} "
-            f"[repr.attrib_name]uri[/repr.attrib_name]: {doc.uri}"
-            + title_part
-            + f" [repr.attrib_name]meta[/repr.attrib_name]: {doc.metadata}"
-        )
+        parts = [f"[repr.attrib_name]id[/repr.attrib_name]: {doc.id}"]
+        if doc.uri:
+            parts.append(f"[repr.attrib_name]uri[/repr.attrib_name]: {doc.uri}")
+        if doc.title:
+            parts.append(f"[repr.attrib_name]title[/repr.attrib_name]: {doc.title}")
+        if doc.metadata:
+            parts.append(f"[repr.attrib_name]meta[/repr.attrib_name]: {doc.metadata}")
+        self.console.print(" ".join(parts))
         self.console.print(
             f"[repr.attrib_name]created at[/repr.attrib_name]: {doc.created_at} [repr.attrib_name]updated at[/repr.attrib_name]: {doc.updated_at}"
         )
-        self.console.print("[repr.attrib_name]content[/repr.attrib_name]:")
-        self.console.print(content)
+        # `list` does not load content, which is where the docling blobs live, so
+        # the header would otherwise announce a field the command declined to fetch.
+        if doc.content:
+            self.console.print("[repr.attrib_name]content[/repr.attrib_name]:")
+            self.console.print(content)
         self.console.rule()
 
     def _rich_print_search_result(self, result: "SearchResult"):

tests/test_app.py

@@ -59,6 +59,36 @@ def _doc(content: str = "body text", **kwargs) -> Document:
     return doc
 
 
+async def test_a_listing_omits_the_fields_it_did_not_fetch(app, client):
+    """`list` does not load content, and a document need not carry a uri, a
+    title or metadata. Printing a header for each regardless announced fields
+    the command declined to fetch or the document never had."""
+    bare = Document(content="", uri=None)
+    bare.id = "doc-bare"
+    client.list_documents.return_value = [bare]
+
+    await app.list_documents()
+
+    printed = out(app)
+    assert "doc-bare" in printed
+    for absent in ("uri:", "title:", "meta:", "content:"):
+        assert absent not in printed, absent
+
+
+async def test_a_listing_prints_the_fields_it_has(app, client):
+    client.list_documents.return_value = [
+        _doc("body text", title="A title", metadata={"k": "v"})
+    ]
+
+    await app.list_documents()
+
+    printed = out(app)
+    assert "uri: test://doc" in printed
+    assert "title: A title" in printed
+    assert "meta:" in printed
+    assert "content:" in printed
+
+
 async def test_list_documents_prints_each_document(app, client):
     client.list_documents.return_value = [_doc("first"), _doc("second")]