Merge pull request #5 from mongodb-developer/fix/quick-fix

Fix/quick fix

Author: ricardohsmello

java/101_aggregation_pipeline_arrays.ipynb

@@ -64,6 +64,8 @@
     "import static com.mongodb.client.model.Aggregates.project;\n",
     "import static com.mongodb.client.model.Aggregates.sort;\n",
     "import static com.mongodb.client.model.Aggregates.addFields;\n",
+    "import static com.mongodb.client.model.Aggregates.limit;\n",
+    "\n",
     "\n",
     "import org.bson.Document;\n",
     "import org.bson.conversions.Bson;\n",
@@ -163,7 +165,7 @@
     "\n",
     "AggregateIterable<Document> result = books.aggregate(\n",
     "    List.of(\n",
-    "        Aggregates.match(Filters.in(\"genres\", \"Family Life\", \"Fiction\")),\n",
+    "        Aggregates.match(in(\"genres\", \"Family Life\", \"Fiction\")),\n",
     "        Aggregates.project(new Document()\n",
     "            .append(\"title\", 1)\n",
     "            .append(\"genres\", 1)\n",
@@ -205,7 +207,19 @@
    },
    "outputs": [],
    "source": [
-    "// type your code here"
+    "// TYPE YOUR CODE HERE\n",
+    "\n",
+    "AggregateIterable<Document> result = books.aggregate(\n",
+    "    List.of(\n",
+    "        <REPLACE_WITH_MATCH_STAGE>,\n",
+    "        <REPLACE_WITH_PROJECT_STAGE>\n",
+    "    )\n",
+    ");\n",
+    "\n",
+    "// Iterate through the results\n",
+    "for (Document doc : result) {\n",
+    "    System.out.println(\"book: \" + doc.toJson());\n",
+    "}"
    ]
   },
   {
@@ -228,7 +242,19 @@
    },
    "outputs": [],
    "source": [
-    "// type your code here"
+    "// TYPE YOUR CODE HERE\n",
+    "\n",
+    "AggregateIterable<Document> result = books.aggregate(\n",
+    "    List.of(\n",
+    "        <REPLACE_WITH_MATCH_STAGE>,\n",
+    "        <REPLACE_WITH_ADDFIELDS_STAGE>\n",
+    "    )\n",
+    ");\n",
+    "\n",
+    "// Iterate through the results\n",
+    "for (Document doc : result) {\n",
+    "    System.out.println(\"book: \" + doc.toJson());\n",
+    "}"
    ]
   }
  ],

java/102_aggregation_pipeline_unwind.ipynb

@@ -47,6 +47,8 @@
     "import com.mongodb.client.MongoDatabase;\n",
     "import com.mongodb.client.model.Aggregates;\n",
     "import com.mongodb.client.model.Filters;\n",
+    "import com.mongodb.client.model.Projections;\n",
+    "\n",
     "import org.bson.Document;\n",
     "\n",
     "import static com.mongodb.client.model.Filters.eq;\n",
@@ -118,6 +120,53 @@
     "    System.out.println(\"book: \" + doc.toJson());\n",
     "}"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "df18e342",
+   "metadata": {},
+   "source": [
+    "## Challenges"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "39c96bba",
+   "metadata": {},
+   "source": [
+    "### Return one document per author for book id 1567189644\n",
+    "\n",
+    "Use `$match` to select the book with `_id` `\"1567189644\"`, then use `$unwind` to deconstruct the `authors` array. Finally, use `$project` to return only the book `title` and the author `name`.\n",
+    "\n",
+    "[Solution here](http://localhost:3000/sql-to-query-api-lab/docs/aggregation/group#-3-return-one-document-per-author-for-book-id-1567189644)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "150a1497",
+   "metadata": {
+    "vscode": {
+     "languageId": "java"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "//TYPE YOUR CODE HERE\n",
+    "\n",
+    "AggregateIterable<Document> result = books.aggregate(\n",
+    "    List.of(\n",
+    "        <REPLACE_WITH_MATCH_STAGE>,\n",
+    "        <REPLACE_WITH_UNWIND_STAGE>,\n",
+    "        <REPLACE_WITH_PROJECT_STAGE>,\n",
+    "    )\n",
+    ");\n",
+    "\n",
+    "// Iterate through the results\n",
+    "for (Document doc : result) {\n",
+    "    System.out.println(\"book: \" + doc.toJson());\n",
+    "}"
+   ]
   }
  ],
  "metadata": {

java/104_aggregation_pipeline_group_by.ipynb

@@ -168,7 +168,8 @@
    "source": [
     "AggregateIterable<Document> result = reviews.aggregate(\n",
     "    List.of(\n",
-    "        <REPLACE_WITH_GROUP_STAGE>                        \n",
+    "        <REPLACE_WITH_GROUP_STAGE>,\n",
+    "        <REPLACE_WITH_SORT_STAGE>,\n",
     "        <REPLACE_WITH_LIMIT_STAGE>\n",
     "    )\n",
     ");\n",