fix source lint for ai

Author: knudtty

packages/api/src/routers/api/ai.ts

@@ -268,7 +268,7 @@ router.post(
  connection: connectionId,
  where: '',
  groupBy: '',
- timestampValueExpression: source.timestampValueExpression,
+ timestampValueExpression: source.timestampValueExpression ?? '',
  dateRange: [new Date(Date.now() - ms('60m')), new Date()],
  };
  const keyValues = await metadata.getKeyValues({
@@ -298,15 +298,26 @@ Here are some guidelines:
 
 The user is looking to do a query on their data source named: ${source.name} of type ${source.kind}.
 
-The ${source.kind === SourceKind.Log ? 'log level' : 'span status code'} is stored in ${source.severityTextExpression}.
-You can identify services via ${source.serviceNameExpression}
+${
+ source.kind === SourceKind.Log
+ ? `The log level is stored in ${source.severityTextExpression}.`
+ : source.kind === SourceKind.Trace
+ ? `The span status code is stored in ${source.statusCodeExpression}.`
+ : ''
+}
+
+${'serviceNameExpression' in source ? `You can identify services via ${source.serviceNameExpression}` : ''}
+
 ${
  source.kind === SourceKind.Trace
  ? `Duration of spans can be queried via ${source.durationExpression} which is expressed in 10^-${source.durationPrecision} seconds of precision.
 Span names under ${source.spanNameExpression} and span kinds under ${source.spanKindExpression}`
- : `The log body can be queried via ${source.bodyExpression}`
+ : source.kind === SourceKind.Log
+ ? `The log body can be queried via ${source.bodyExpression}`
+ : ''
 }
-Various log/span-specific attributes as a Map can be found under ${source.eventAttributesExpression} while resource attributes that follow the OpenTelemetry semantic convention can be found under ${source.resourceAttributesExpression}
+${'eventAttributesExpression' in source ? `Various log/span-specific attributes as a Map can be found under ${source.eventAttributesExpression}.` : ''}
+${'resourceAttributesExpression' in source ? `Resource attributes that follow the OpenTelemetry semantic convention can be found under ${source.resourceAttributesExpression}.` : ''}
 You must use the full field name ex. "column['key']" or "column.key" as it appears.
 
 The following is a list of properties and example values that exist in the source:
@@ -386,7 +397,7 @@ ${JSON.stringify(allFieldsWithKeys.slice(0, 200).map(f => ({ field: f.key, type:
  connection: connectionId,
  where: '',
  groupBy: resObject.groupBy,
- timestampValueExpression: source.timestampValueExpression,
+ timestampValueExpression: source.timestampValueExpression ?? '',
  dateRange,
  granularity: 'auto',
  };