fix(eslint-plugin-query): ignore call targets in exhaustive-deps

.changeset/soft-pianos-sip.md

@@ -0,0 +1,5 @@
+---
+'@tanstack/eslint-plugin-query': patch
+---
+
+Relax `exhaustive-deps` so function call targets are not required in query keys while values referenced in nested callbacks are still checked.

docs/eslint/exhaustive-deps.md

@@ -3,8 +3,10 @@ id: exhaustive-deps
 title: Exhaustive dependencies for query keys
 ---
 
-Query keys should be seen like a dependency array to your query function: Every variable that is used inside the queryFn should be added to the query key.
-This makes sure that queries are cached independently and that queries are refetched automatically when the variables changes.
+Query keys should contain the serializable values that identify the data returned by your queryFn.
+This makes sure that queries are cached independently and that queries are refetched automatically when those values change.
+
+Function call targets are not query key dependencies. For example, `fetchTodoById(todoId)` needs `todoId` in the query key, but not `fetchTodoById`. Values referenced inside nested callbacks are still dependencies, so `promise.then(() => todoId)` also needs `todoId` in the query key.
 
 ## Rule Details
 
@@ -29,7 +31,7 @@ Examples of **correct** code for this rule:
 const Component = ({ todoId }) => {
   const todos = useTodos()
   useQuery({
-    queryKey: ['todo', todos, todoId],
+    queryKey: ['todo', todoId],
     queryFn: () => todos.getTodo(todoId),
   })
 }
@@ -46,24 +48,12 @@ const todoQueries = {
 ```
 
 ```tsx
-// with { allowlist: { variables: ["todos"] }}
-const Component = ({ todoId }) => {
-  const todos = useTodos()
-  useQuery({
-    queryKey: ['todo', todoId],
-    queryFn: () => todos.getTodo(todoId),
-  })
-}
-```
-
-```tsx
-// with { allowlist: { types: ["TodosClient"] }}
-class TodosClient { ... }
-const Component = ({ todoId }) => {
-  const todos: TodosClient = new TodosClient()
+// with { allowlist: { types: ["Config"] }}
+class Config { ... }
+const Component = ({ todoId, config }: { todoId: string, config: Config }) => {
   useQuery({
     queryKey: ['todo', todoId],
-    queryFn: () => todos.getTodo(todoId),
+    queryFn: () => fetchTodo(todoId, config.baseUrl),
   })
 }
 ```

packages/eslint-plugin-query/src/__tests__/ast-utils.test.ts

@@ -0,0 +1,53 @@
+import { AST_NODE_TYPES } from '@typescript-eslint/utils'
+import { describe, expect, it } from 'vitest'
+import { ExhaustiveDepsUtils } from '../rules/exhaustive-deps/exhaustive-deps.utils'
+import { ASTUtils } from '../utils/ast-utils'
+import type { TSESLint, TSESTree } from '@typescript-eslint/utils'
+
+function createIdentifier(name: string): TSESTree.Identifier {
+  return { type: AST_NODE_TYPES.Identifier, name } as TSESTree.Identifier
+}
+
+describe('ASTUtils', () => {
+  it('stops member traversal when a node has no parent', () => {
+    const identifier = createIdentifier('value')
+
+    expect(ASTUtils.traverseUpMemberExpression(identifier)).toBe(identifier)
+  })
+
+  it('handles an external reference without a parent', () => {
+    const operation = createIdentifier('operation')
+    const reference = {
+      identifier: operation,
+      isRead: () => true,
+      resolved: null,
+    } as TSESLint.Scope.Reference
+    const scope = {
+      childScopes: [],
+      references: [reference],
+      set: new Map(),
+    } as unknown as TSESLint.Scope.Scope
+    const scopeManager = {
+      acquire: () => scope,
+    } as unknown as TSESLint.Scope.ScopeManager
+    const sourceCode = {
+      getText: () => 'operation',
+    } as unknown as Readonly<TSESLint.SourceCode>
+
+    expect(
+      ASTUtils.getExternalRefs({
+        scopeManager,
+        sourceCode,
+        node: operation,
+      }),
+    ).toEqual([reference])
+  })
+})
+
+describe('ExhaustiveDepsUtils', () => {
+  it('does not treat a detached identifier as a function call target', () => {
+    expect(
+      ExhaustiveDepsUtils.isFunctionCallTarget(createIdentifier('fetchTodos')),
+    ).toBe(false)
+  })
+})