Finding Inconsistencies in Your MongoDB Data

About Me

• Independent Consultant
• Full-stack web applications
• node.js specialist
• Built several production apps on MongoDB
• https://peterlyons.com

Schemaless - Yay?

• Short development time

• Emphasizes coding vs pre-planning schema

• However, comes with some risks

• No protection against developer mistakes

• Easy to end up with undocumented schema and tribal knowledge

• Easy to end up with inconsistent data

Problem: Discovery

• First day on unfamiliar codebase
• What does the data look like?
• Caters to my data-driven development approach

Problem: Inconsistent Data

• User.email started out as a string
• Requirement came down to support multiple emails
• Code changed to store new users as an array instead
• No support to follow-through with this change across all instances of the database, all areas of the codebase

White Glove

• I started coding a tool to help with these challenges

Release early. Release often. And listen to your customers. -- Eric Raymond

• Demos

Questions, Comments, Suggestions

References

• White Glove on github
• White Glove on npm
• Peter Norvig: How Computers Learn

The End

peterlyons.com