LESSON 15 - Error syncing Query

[DorianDaSilva]

Error: failed to process trigger: block #7977546 (0x9314…63a3), transaction f7902183755ee06baa7b755a295b3b941fa4e5b0ef2c1c4bd5137d5fe785f2ec: Entity ActiveItem[0x00x2bbaee667e6804d3cde73bb3b3c4ae7c0b5e53c1]: missing value for non-nullable field `buyer` wasm backtrace: 0: 0x2de6 - <unknown>!generated/schema/ActiveItem#save 1: 0x3745 - <unknown>!src/mapping/handleItemListed

To view more details about this indexing error, please view the documentation.

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Playground

• Managed to complete subgraph build & initial sync complete at 100%

• Ran the query in playground which returned similar output than the video
  

• Transaction listed on etherscan
  
  

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issue

Error comes after refreshing the page as suggested - No solutions found in Docs (Not sure to understand the error log)

Any help understanding the error and/or suggested fix would be very much appreciated. Thank you!

[AditiNarkar]

Make sure to initialise activeItem.buyer before doing activeItem.save(); in handleItemListed function.

activeItem.buyer = Address.fromString(
"0x0000000000000000000000000000000000000000"
);