Changes between Version 2 and Version 3 of Ticket #30286


Ignore:
Timestamp:
Mar 24, 2019, 8:24:18 PM (7 years ago)
Author:
Samuel Labrador
Comment:

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  • Ticket #30286

    • Property Resolution → invalid
    • Property Status new → closed
    • Property Type Bug → New feature

  • Ticket #30286 – Description

    v2 v3  
    1 When a Model with a GenericForeignKey field is assigned, the model's id is overwritten with the GenericForeignKey's id on assignment.
    2 
    3 I am using a mySQL database (Ver 14.14 Distrib 5.6.28), Python3(3.7.2), and django(2.1.7)
    4 
    5 Models:
    6 {{{
    7     class Incident(models.Model):
    8         start_timestamp = models.DateTimeField(auto_now=True)
    9         class Meta:
    10             abstract = True
    11 
    12     class DailyLog(Incident):
    13         date = models.DateField(auto_now=True)
    14         entries = GenericRelation(DailyLogHistory, object_id_field='id', content_type_field='incident_type')
    15 
    16     class Data(models.Model):
    17         creator = models.CharField(max_length=255)
    18         creator_details = models.TextField(blank=True, null=True, default=None)
    19         timestamp = models.DateTimeField(auto_now=True)
    20         incident_type = models.ForeignKey(ContentType, on_delete=models.CASCADE, primary_key=False, unique=False, blank=True, null=True)
    21         incident_object = GenericForeignKey('incident_type', 'id')
    22         class Meta:
    23             abstract = True   
    24 
    25     class DailyLogHistory(Data):
    26             selections = CSVField(blank=True, null=True, default=None)
    27 
    28  }}}
    29 
    30 code that produces the bug:
    31 
    32 {{{
    33 incident = DailyLog.objects.get(id=1)
    34 
    35 x = DailyLogHistory(
    36         selections=['123456'],
    37         creator='sam',
    38 )
    39 x.save()
    40 
    41 print(x) # Shows the correct auto-incremented id != 1
    42 x.incident_object = incident
    43 print(x) # Shows that id == 1
    44 
    45 }}}
     1Not a bug. Stupid error on my part. The GenericForeignKey id is the same as that specified in the model.
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