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add a note on setting object references via context #543

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add a note on setting object references via context #543

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ec02e7a
add a note on setting object references via context
normadn Nov 5, 2023
b569bfe
Improved note under data source context.
normadn Nov 5, 2023
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2 changes: 2 additions & 0 deletions website/pages/en/developing/creating-a-subgraph.mdx
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Expand Up @@ -683,6 +683,8 @@ let tradingPair = context.getString('tradingPair')

There are setters and getters like `setString` and `getString` for all value types.

> **Note:** Referecing an entity is done via ID in graphQL. That id can be passed into the instantiated data source by setting it in the context and then accessed within the mapping of the template. Example can be found in the [documenation of graph-ts](https://github.com/graphprotocol/graph-tooling/tree/main/packages/ts#api).

## Start Blocks

The `startBlock` is an optional setting that allows you to define from which block in the chain the data source will start indexing. Setting the start block allows the data source to skip potentially millions of blocks that are irrelevant. Typically, a subgraph developer will set `startBlock` to the block in which the smart contract of the data source was created.
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