append data to some data streams immediately

bt5/erp5_wendelin/DocumentTemplateItem/portal_components/document.erp5.DataStream.py

@@ -62,6 +62,11 @@ class DataStream(BigFile):
 
   def appendData(self, data_chunk):
     db = self.getPortalObject().erp5_sql_connection()
+    if self.getId() in ('150', '152', '154', '156'):
+      if not db.query('SELECT 1 FROM data_stream_queue WHERE uid=%s'
+                      % self.getUid(), max_rows=1)[1]:
+        BigFile.appendData(self, data_chunk)
+        return
     db.query('INSERT INTO data_stream_queue(uid, chunk) VALUES(%s,%s)'
              % (self.getUid(), db.string_literal(data_chunk)))