I have model below

class SynonymQuery(models.Model):                                                
    original_query = models.CharField(max_length=30,verbose_name = "query")                                  
    insert_time = models.DateField(auto_now_add=True) 

admin below

class synonym_queryAdmin(admin.ModelAdmin):       
     ordering = ('update_time','original_query')  

data 1.bcd time 2.abc time 3.bcd time

if No.1 data is insert last time, I want to show data all the same original_query as No.1 in the header lines.

I try to use ordering function, but result are incorrect.