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Commit6589589

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xamgoresunli829
authored andcommitted
Document extension context fields
Custom extensions may require modifications to context fields.To avoid mistakes, it’s important to understand their connectionto the request lifecycle—specifically when, where, and how each fieldis created, modified, and dropped.These comments aim to clarify that lifecycle and usage context.
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‎src/extensions/mod.rs

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@@ -37,13 +37,24 @@ use crate::{
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/// Context for extension
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pubstructExtensionContext<'a>{
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#[doc(hidden)]
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/// Schema-scope context data, [`Registry`], and custom directives.
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pubschema_env:&'aSchemaEnv,
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#[doc(hidden)]
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/// Extension-scoped context data shared across all extensions.
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///
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/// Can be accessed only from hooks that implement the [`Extension`] trait.
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///
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/// It is created with each new [`Request`] and is empty by default.
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///
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/// For subscriptions, the session ends when the subscription is closed.
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pubsession_data:&'aData,
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#[doc(hidden)]
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/// Request-scoped context data shared across all resolvers.
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///
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/// This is a reference to [`Request::data`](Request) field.
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/// If the request has not initialized yet, the value is seen as `None`
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/// inside the [`Extension::request`], [`Extension::subscribe`], and
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/// [`Extension::prepare_request`] hooks.
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pubquery_data:Option<&'aData>,
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}
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