📰 Dev.to · ThaSha
Articles from Dev.to · ThaSha · 13 articles · Updated every 3 hours · View all reads
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⚡ AI Lessons (9011)
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Dev.to · ThaSha
5d ago
DataWeave partition() for Bulk API Responses: Stop Returning Silent 200 OKs
Our bulk import API returned 200 OK on every request. Nobody noticed that 40% of records were failing...
Dev.to · ThaSha
6d ago
Parsing LLM Responses in DataWeave: 3 Layers of Defense Against Markdown Fences
I connected MuleSoft to GPT-4o last quarter for a support ticket classifier. The prompt builder...
Dev.to · ThaSha
6d ago
Building LLM Prompts From Enterprise Data in DataWeave: 2 Traps That Garbled My AI Output
I connected a MuleSoft API to an LLM last quarter for a support ticket classifier. The API call was...
Dev.to · ThaSha
6d ago
DataWeave Runtime Type Detection: Auto-Discover Schema Mismatches Before They Break Production
I built a schema discovery function for a 6-system integration last year. Each source sent different...
Dev.to · ThaSha
6d ago
Recursive PII Masking in DataWeave: One Function for Any Depth (and the Null Trap)
A compliance audit found SSN values 4 levels deep in our API responses last year. One recursive...
Dev.to · ThaSha
6d ago
DataWeave match/case: Replace If/Else Chains and Avoid the Missing Else Crash
I replaced a 40-line if/else chain with 4 match/case lines last month. Then I forgot the else clause...
Dev.to · ThaSha
6d ago
Multi-Level GroupBy in DataWeave: 2 Traps That Break Your Nested Aggregations
I spent 2 days building a 3-level sales report in DataWeave. Region to country to product, with...
Dev.to · ThaSha
6d ago
The DataWeave <~ Operator: How Angle Brackets in Customer Notes Broke 200 Orders
A customer typed "" in their notes field. It broke 200 XML orders and I spent 3 hours finding a...
Dev.to · ThaSha
6d ago
DataWeave 2.5 Generics: How Call-Site Type Parameters Caught 3 Production Bugs
I maintained a shared DataWeave utility library across 12 Mule apps for 2 years. Functions like topN,...
Dev.to · ThaSha
6d ago
Config-Driven DataWeave Mapping: The Null Trap Nobody Warns You About
I had 12 tenants sending the same data in 12 different field names. Instead of writing 12 transforms,...
Dev.to · ThaSha
1w ago
DataWeave Custom Functions: The Module Trap That Wastes Hours
TL;DR Your fun declaration works inline but breaks with "Unable to resolve reference" when moved to...
Dev.to · ThaSha
1w ago
DataWeave Custom Functions: The Module Trap That Wastes Hours
TL;DR Your fun declaration works inline but breaks with "Unable to resolve reference" when moved to...
Dev.to · ThaSha
1w ago
DataWeave XML to JSON: Handle Attributes, Namespaces, and Arrays
I built a legacy migration last year converting XML responses to JSON. The automatic conversion lost...
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