How to perform numeric comparisons on string fields with units in MongoDB/Mongoose?

📰 Dev.to · Jai Aakash

Learn to perform numeric comparisons on string fields with units in MongoDB/Mongoose for a recipe API

intermediate Published 25 Sept 2025
Action Steps
  1. Define a schema for your MongoDB documents using Mongoose
  2. Use the $split operator to separate the numeric value from the unit in your string field
  3. Apply the $toInt operator to convert the numeric string to an integer for comparison
  4. Use the $gt or $lt operator to perform numeric comparisons on the converted integer field
  5. Test your query with sample data to ensure correct results
Who Needs to Know This

Backend developers and data engineers working with MongoDB and Mongoose can benefit from this lesson to handle numeric comparisons on string fields with units

Key Insight

💡 Use MongoDB's aggregation operators to separate and convert numeric strings for comparisons

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📈 Perform numeric comparisons on string fields with units in #MongoDB/#Mongoose

Key Takeaways

Learn to perform numeric comparisons on string fields with units in MongoDB/Mongoose for a recipe API

Full Article

Hi everyone, I’m building a recipe API using Node.js, Express, and Mongoose. My MongoDB documents...
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