MongoDB tutorial code examples

python-mongodb/README.md

+# Description
+
+The files in this folder provides the code for the examples discussed on: [How to Use Python to Interface With MongoDB: The Basics](https://realpython.com/blog/python/introduction-to-mongodb-and-python/) for more info.

python-mongodb/mongoengine_example.py

+from mongoengine import connect, Document, StringField, ListField, URLField
+
+# Establishing a Connection
+connect(db="rpblog", host="localhost", port=27017)
+
+
+# Defining a Document Schema or Model
+class Posts(Document):
+    title = StringField(required=True, max_length=70)
+    author = StringField(required=True, max_length=20)
+    contributors = ListField(StringField(max_length=20))
+    url = URLField(required=True)
+
+
+# Creating and Saving Documents
+post = Posts(
+    title="Beautiful Soup: Build a Web Scraper With Python",
+    author="Martin",
+    contributors=["Aldren", "Geir", "Jaya", "Joanna", "Mike"],
+    url="https://realpython.com/beautiful-soup-web-scraper-python/"
+)
+post.save()  # Insert the new post
+
+# Retrieving All the Documents
+for post in Posts.objects:
+    print(post.title)
+
+# Filtering Documents by Author
+for post in Posts.objects(author="Alex"):
+    print(post.title)

python-mongodb/pymongo_example.py

+import pprint
+
+from pymongo import MongoClient
+
+# Establishing a Connection
+client = MongoClient("localhost", 27017)
+
+# Accessing Databases
+db = client.rpblog
+
+# Accessing Collections
+posts = db.posts
+
+# Inserting a Single Document
+post = {
+    "title": "Working With JSON Data in Python",
+    "author": "Lucas",
+    "contributors": ["Aldren", "Dan", "Joanna"],
+    "url": "https://realpython.com/python-json/",
+}
+result = posts.insert_one(post)
+print(f"One post: {result.inserted_id}")
+
+# Inserting Several Documents
+post_1 = {
+    "title": "Python’s Requests Library (Guide)",
+    "author": "Alex",
+    "contributors": [
+        "Aldren",
+        "Brad",
+        "Joanna"
+    ],
+    "url": "https://realpython.com/python-requests/"
+}
+
+post_2 = {
+    "title": "Object-Oriented Programming (OOP) in Python 3",
+    "author": "David",
+    "contributors": [
+        "Aldren",
+        "Joanna",
+        "Jacob"
+    ],
+    "url": "https://realpython.com/python3-object-oriented-programming/"
+}
+
+new_result = posts.insert_many([post_1, post_2])
+print(f"Multiple posts: {new_result.inserted_ids}")
+
+# Retrieving All Documents
+for doc in posts.find():
+    pprint.pprint(doc)
+
+# Retrieving a Single Document
+jon_post = posts.find_one({"author": "Jon"})
+pprint.pprint(jon_post)
+
+# Closing a Connection
+with MongoClient() as client:
+    db = client.rpblog
+    for doc in db.posts.find():
+        pprint.pprint(doc)