fix(selectors): resolve env var references at design time for selector context (#3446)

* fix(selectors): resolve env var references at design time for selector context

Selectors now resolve {{ENV_VAR}} references before building context and
returning dependency values to consumers, enabling env-var-based credentials
(e.g. {{SLACK_BOT_TOKEN}}) to work with selector dropdowns.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix(selectors): prevent unresolved env var templates from leaking into context

- Fall back to undefined instead of raw template string when env var is
  missing from store, so the null-check in the context loop discards it
- Use resolvedDetailId in query cache key so React Query refetches when
  the underlying env var value changes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix(selectors): use || for consistent empty-string env var handling

Align use-selector-setup.ts with use-selector-query.ts by using || instead
of ?? so empty-string env var values are treated as unset.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: waleedlatif1

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/editor/components/sub-block/hooks/use-selector-setup.ts

@@ -3,8 +3,9 @@
 import { useMemo } from 'react'
 import { useParams } from 'next/navigation'
 import type { SubBlockConfig } from '@/blocks/types'
-import { isEnvVarReference, isReference } from '@/executor/constants'
+import { extractEnvVarName, isEnvVarReference, isReference } from '@/executor/constants'
 import type { SelectorContext, SelectorKey } from '@/hooks/selectors/types'
+import { useEnvironmentStore } from '@/stores/settings/environment'
 import { useWorkflowRegistry } from '@/stores/workflows/registry/store'
 import { useDependsOnGate } from './use-depends-on-gate'
 
@@ -30,23 +31,43 @@ export function useSelectorSetup(
   const activeWorkflowId = useWorkflowRegistry((s) => s.activeWorkflowId)
   const workflowId = (params?.workflowId as string) || activeWorkflowId || ''
 
+  const envVariables = useEnvironmentStore((s) => s.variables)
+
   const { finalDisabled, dependencyValues, canonicalIndex } = useDependsOnGate(
     blockId,
     subBlock,
     opts
   )
 
+  const resolvedDependencyValues = useMemo(() => {
+    const resolved: Record<string, unknown> = {}
+    for (const [key, value] of Object.entries(dependencyValues)) {
+      if (value === null || value === undefined) {
+        resolved[key] = value
+        continue
+      }
+      const str = String(value)
+      if (isEnvVarReference(str)) {
+        const varName = extractEnvVarName(str)
+        resolved[key] = envVariables[varName]?.value || undefined
+      } else {
+        resolved[key] = value
+      }
+    }
+    return resolved
+  }, [dependencyValues, envVariables])
+
   const selectorContext = useMemo<SelectorContext>(() => {
     const context: SelectorContext = {
       workflowId,
       mimeType: subBlock.mimeType,
     }
 
-    for (const [depKey, value] of Object.entries(dependencyValues)) {
+    for (const [depKey, value] of Object.entries(resolvedDependencyValues)) {
       if (value === null || value === undefined) continue
       const strValue = String(value)
       if (!strValue) continue
-      if (isReference(strValue) || isEnvVarReference(strValue)) continue
+      if (isReference(strValue)) continue
 
       const canonicalParamId = canonicalIndex.canonicalIdBySubBlockId[depKey] ?? depKey
 
@@ -58,14 +79,14 @@ export function useSelectorSetup(
     }
 
     return context
-  }, [dependencyValues, canonicalIndex, workflowId, subBlock.mimeType])
+  }, [resolvedDependencyValues, canonicalIndex, workflowId, subBlock.mimeType])
 
   return {
     selectorKey: (subBlock.selectorKey ?? null) as SelectorKey | null,
     selectorContext,
     allowSearch: subBlock.selectorAllowSearch ?? true,
     disabled: finalDisabled || !subBlock.selectorKey,
-    dependencyValues,
+    dependencyValues: resolvedDependencyValues,
   }
 }
 

apps/sim/hooks/selectors/use-selector-query.ts

@@ -1,8 +1,9 @@
 import { useMemo } from 'react'
 import { useQuery } from '@tanstack/react-query'
-import { isEnvVarReference, isReference } from '@/executor/constants'
+import { extractEnvVarName, isEnvVarReference, isReference } from '@/executor/constants'
 import { getSelectorDefinition, mergeOption } from '@/hooks/selectors/registry'
 import type { SelectorKey, SelectorOption, SelectorQueryArgs } from '@/hooks/selectors/types'
+import { useEnvironmentStore } from '@/stores/settings/environment'
 
 interface SelectorHookArgs extends Omit<SelectorQueryArgs, 'key'> {
   search?: string
@@ -30,14 +31,25 @@ export function useSelectorOptionDetail(
   key: SelectorKey,
   args: SelectorHookArgs & { detailId?: string }
 ) {
+  const envVariables = useEnvironmentStore((s) => s.variables)
   const definition = getSelectorDefinition(key)
+
+  const resolvedDetailId = useMemo(() => {
+    if (!args.detailId) return undefined
+    if (isReference(args.detailId)) return undefined
+    if (isEnvVarReference(args.detailId)) {
+      const varName = extractEnvVarName(args.detailId)
+      return envVariables[varName]?.value || undefined
+    }
+    return args.detailId
+  }, [args.detailId, envVariables])
+
   const queryArgs: SelectorQueryArgs = {
     key,
     context: args.context,
-    detailId: args.detailId,
+    detailId: resolvedDetailId,
   }
-  const hasRealDetailId =
-    Boolean(args.detailId) && !isReference(args.detailId!) && !isEnvVarReference(args.detailId!)
+  const hasRealDetailId = Boolean(resolvedDetailId)
   const baseEnabled =
     hasRealDetailId && definition.fetchById !== undefined
       ? definition.enabled
@@ -47,7 +59,7 @@ export function useSelectorOptionDetail(
   const enabled = args.enabled ?? baseEnabled
 
   const query = useQuery<SelectorOption | null>({
-    queryKey: [...definition.getQueryKey(queryArgs), 'detail', args.detailId ?? 'none'],
+    queryKey: [...definition.getQueryKey(queryArgs), 'detail', resolvedDetailId ?? 'none'],
     queryFn: () => definition.fetchById!(queryArgs),
     enabled,
     staleTime: definition.staleTime ?? 300_000,