Issue #3421720 Only read the current associated row in the loop

src/Sheet/Reader.php

@@ -156,12 +156,15 @@ class Reader implements ReaderInterface {
    *   The row at which to start reading.
    * @param int $start_column
    *   The column at which to start reading.
+   * @param int $end_row
+   *   The row at which to stop reading i.e. the last row to read.
    */
   protected function doRead(
     Worksheet $sheet,
     EntityFormatInterface $format,
     $start_row,
-    $start_column
+    $start_column,
+    $end_row = NULL
   ) {
     $entity = NULL;
     $entity_type_id = $format->getEntityTypeId();
@@ -181,6 +184,10 @@ class Reader implements ReaderInterface {
 
     // Go through each row and read its data.
     foreach ($sheet->getRowIterator($start_row) as $row) {
+      if ($end_row !== NULL && $row->getRowIndex() === $end_row + 1) {
+        break;
+      }
+
       if ($this->isRowEmpty($row)) {
         continue;
       }
@@ -206,7 +213,10 @@ class Reader implements ReaderInterface {
           $sheet,
           $associated_format,
           $row->getRowIndex(),
-          $associated_section['start']
+          $associated_section['start'],
+          // Only read this row, without this it would loop over all remaining
+          // rows and process all associated entities.
+          $row->getRowIndex()
         );
         continue;
       }
@@ -267,7 +277,10 @@ class Reader implements ReaderInterface {
         $sheet,
         $associated_format,
         $row->getRowIndex(),
-        $associated_section['start']
+        $associated_section['start'],
+        // Only read this row, without this it would loop over all remaining
+        // rows and process all associated entities.
+        $row->getRowIndex()
       );
     }
   }