@@ -1173,3 +1173,25 @@ Feature: Manage WordPress posts
 
     When I run `wp post list --post_status=publish --orderby=ID --order=desc --posts_per_page=2 --fields=ID,url --format=csv`
     Then STDOUT should match /^ID,url\n(\d+),https?:\/\/example\.com\/\?p=\1\n(\d+),https?:\/\/example\.com\/\?p=\2$/
+
+  Scenario: List post meta as a field for some posts only
+    Given a WP install
+    And I run `wp post create --post_title=First --post_status=publish --porcelain`
+    And save STDOUT as {FIRST}
+    And I run `wp post create --post_title=Second --post_status=publish --porcelain`
+    And save STDOUT as {SECOND}
+    And I run `wp post meta add {SECOND} batch_meta second-value`
+
+    When I run `wp post list --post__in={FIRST},{SECOND} --orderby=ID --order=asc --fields=ID,batch_meta --format=csv`
+    Then STDOUT should be:
+      """
+      ID,batch_meta
+      {FIRST},
+      {SECOND},second-value
+      """
+
+    When I try `wp post list --post__in={FIRST},{SECOND} --fields=ID,missing_meta --format=csv`
+    Then STDERR should be:
+      """
+      Warning: Field not found in any item: missing_meta.
+      """
@@ -1062,8 +1062,8 @@ public function list_( $args, $assoc_args ) {
 			$query                = new WP_Query( $query_args );
 			$formatter->display_items( $query->posts ?? [] );
 		} else {
-			$need_url = 'url' === $formatter->field || in_array( 'url', (array) $formatter->fields, true );
-			$formatter->display_items( $this->query_posts_in_chunks( $query_args, $need_url ) );
+			$fields = $formatter->field ? [ $formatter->field ] : (array) $formatter->fields;
+			$formatter->display_items( $this->query_posts_in_chunks( $query_args, $fields ) );
 		}
 	}
 
@@ -1074,11 +1074,23 @@ public function list_( $args, $assoc_args ) {
 	 * at a time with the same query arguments, and the object cache is cleared after each
 	 * chunk. Formats that can be written item by item are then streamed by the formatter.
 	 *
+	 * Fields that WP_Post computes on access, like post meta, are read from the object
+	 * cache. If any of them are displayed, the cache is kept, because the formatter may
+	 * only read them once all posts have been loaded.
+	 *
 	 * @param array<string, mixed> $query_args WP_Query arguments.
-	 * @param bool                 $need_url   Whether to add the `url` property to each post.
+	 * @param string[]             $fields     Fields that will be displayed.
 	 * @return \Generator<int, \WP_Post>
 	 */
-	private function query_posts_in_chunks( $query_args, $need_url ) {
+	private function query_posts_in_chunks( $query_args, $fields ) {
+		$need_url    = in_array( 'url', $fields, true );
+		$clear_cache = true;
+		foreach ( $fields as $field ) {
+			if ( 'url' !== $field && ! property_exists( 'WP_Post', $field ) && ! property_exists( 'WP_Post', 'post_' . $field ) ) {
+				$clear_cache = false;
+			}
+		}
+
 		/** @var int[] $ids */
 		$ids = ( new WP_Query( array_merge( $query_args, [ 'fields' => 'ids' ] ) ) )->posts;
 
@@ -1117,7 +1129,9 @@ private function query_posts_in_chunks( $query_args, $need_url ) {
 			}
 
 			unset( $posts, $query );
-			self::clear_runtime_object_cache();
+			if ( $clear_cache ) {
+				self::clear_runtime_object_cache();
+			}
 		}
 	}