DOCSP-13862 delete one usage example (#6)

* added usage example deleteOne page

Author: kyuan-mongodb

source/includes/usage-examples/code-snippets/deleteOne.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+)
+
+// Replace the uri string with your MongoDB deployment's connection string.
+const uri = "mongodb+srv://<username>:<password>@<cluster-address>/test?w=majority"
+	
+func main() {
+	client, err := mongo.Connect(context.TODO(), options.Client().ApplyURI(uri))
+	
+	if err != nil {
+		panic(err)
+	}
+	defer func() {
+		if err = client.Disconnect(context.TODO()); err != nil {
+			panic(err)
+		}
+	}()
+
+	// begin deleteOne
+	coll := client.Database("sample_mflix").Collection("movies")
+	result, err := coll.DeleteOne(context.TODO(), bson.D{{"title", "Twilight"}})
+	// end deleteOne
+
+	if err != nil {
+		panic(err)
+	}
+
+	// When you run this file for the first time, it should print "Documents deleted: 1"
+	fmt.Printf("Documents deleted: %d\n", result.DeletedCount)
+}

source/code-snippets/find.go renamed to source/includes/usage-examples/code-snippets/find.go

@@ -8,10 +8,10 @@ Usage Examples
 
    /usage-examples/find-operations
    /usage-examples/update-operations
+   /usage-examples/delete-operations
 
 ..
    /usage-examples/insert-operations
-   /usage-examples/delete-operations
    /usage-examples/bulkWrite
    /usage-examples/watch
    /usage-examples/count

source/code-snippets/updateMany.go renamed to source/includes/usage-examples/code-snippets/updateMany.go

@@ -3,3 +3,50 @@ Delete a Document
 =================
 
 .. default-domain:: mongodb
+
+You can delete a document in a collection using the ``DeleteOne()``
+method. 
+
+The following example specifies a query filter that matches documents in
+the ``movies`` collection with the value "Twilight" in the ``title`` field, and
+deletes the first document that matches. 
+
+.. include:: /includes/usage-examples/run-example-tip.rst
+
+.. literalinclude:: /includes/usage-examples/code-snippets/deleteOne.go
+   :start-after: begin deleteOne
+   :end-before: end deleteOne
+   :emphasize-lines: 2
+   :language: go
+   :dedent:
+
+Click here <TODO> to see a fully runnable example.
+
+Expected Result
+---------------
+
+After running the preceding code snippet, you should not be able to find
+the following document in the ``movies`` collection:
+
+.. code-block:: json
+
+    { "_id": { "$oid": "573a13bff29313caabd5e06b" }, 
+      ...
+      "title": "Twilight",
+      ...
+    }
+
+For an example on how to find a document, see our :doc:`Find
+One Usage Example </usage-examples/findOne>`.
+
+Additional Information
+----------------------
+
+For more information on deleting documents, specifying query filters,
+and handling potential errors, see our guide on <TODO:
+Deleting a Document>.
+
+API Documentation
+~~~~~~~~~~~~~~~~~
+
+`DeleteOne() <https://pkg.go.dev/go.mongodb.org/[email protected]/mongo#Collection.DeleteOne>`__

source/code-snippets/updateOne.go renamed to source/includes/usage-examples/code-snippets/updateOne.go

@@ -11,9 +11,9 @@ The following example passes a query filter to the ``Find()`` method,
 which matches documents in the ``zips`` collection where the value of the
 ``pop`` field is less than or equal to *500*:
 
-.. include:: /includes/run-example-tip.rst
+.. include:: /includes/usage-examples/run-example-tip.rst
 
-.. literalinclude:: /code-snippets/find.go
+.. literalinclude:: /includes/usage-examples/code-snippets/find.go
    :start-after: begin find
    :end-before: end find
    :emphasize-lines: 4

source/includes/run-example-tip.rst renamed to source/includes/usage-examples/run-example-tip.rst

@@ -13,9 +13,9 @@ The following example passes a query filter and an update parameter to the
 field is "Sydney" and multiplies the ``price`` field in the matching
 documents by a factor of *1.15*:
 
-.. include:: /includes/run-example-tip.rst
+.. include:: /includes/usage-examples/run-example-tip.rst
 
-.. literalinclude:: /code-snippets/updateMany.go
+.. literalinclude:: /includes/usage-examples/code-snippets/updateMany.go
    :start-after: begin updatemany
    :end-before: end updatemany
    :emphasize-lines: 5
@@ -55,4 +55,4 @@ see the :manual:`MongoDB update operator reference documentation
 API Documentation
 ~~~~~~~~~~~~~~~~~
 
-`UpdateMany() <https://pkg.go.dev/go.mongodb.org/[email protected]/mongo#Collection.UpdateMany>`_
+`UpdateMany() <https://pkg.go.dev/go.mongodb.org/[email protected]/mongo#Collection.UpdateMany>`__

source/usage-examples.txt

@@ -12,9 +12,9 @@ The following example passes a query filter and an update parameter to the
 by the value of its ``_id`` field and creates a new field in that document called
 ``avg_rating`` with a value of *4.4*:
 
-.. include:: /includes/run-example-tip.rst
+.. include:: /includes/usage-examples/run-example-tip.rst
 
-.. literalinclude:: /code-snippets/updateOne.go
+.. literalinclude:: /includes/usage-examples/code-snippets/updateOne.go
    :start-after: begin updateone
    :end-before: end updateone
    :emphasize-lines: 6
@@ -55,4 +55,4 @@ see the :manual:`MongoDB update operator reference documentation
 API Documentation
 ~~~~~~~~~~~~~~~~~
 
-`UpdateOne() <https://pkg.go.dev/go.mongodb.org/[email protected]/mongo#Collection.UpdateOne>`_
+`UpdateOne() <https://pkg.go.dev/go.mongodb.org/[email protected]/mongo#Collection.UpdateOne>`__