class EvalState(models.Model,AtlasBaseHelper):
"""
Represents Eval State:
ACTIVE
INACTIVE
DELETE
NA
"""
name = models.CharField(max_length=32, unique=True)
friendly_name = models.CharField(max_length=32, unique=True)
description = models.CharField(max_length=255, blank=True, null=True)
class Meta:
verbose_name = "Eval States"
def __unicode__(self):
return self.name
class Bundle(AtlasAuditModel, AtlasBaseHelper):^M
"""^M
Represents the bundle purchased by the customer. The bundle^M
contains a reference identifier which remains the same if the^M
the bundle is either upgraded or entended.^M
A bundle can have 0 or more features.^M
"""^M
bundle_id = models.CharField(verbose_name="Bundle ID",^M
max_length=32,^M
unique=True)^M
customer = models.ForeignKey(Customer)^M
description = models.CharField(max_length=255, blank=True, null=True)^M
state = models.ForeignKey(BundleState)^M
extended_state = models.ForeignKey(BundleExtendedState)^M
type = models.ForeignKey(BundleType)^M
quantity = models.FloatField(blank=False)^M
start_date = models.DateField(verbose_name="Start Date")^M
end_date = models.DateField(verbose_name="End Date")^M
stage = models.CharField(max_length=32, blank=True, null=True)^M
*stage_state = models.ForeignKey(EvalState, verbose_name="Eval State",
null=True)*
The Below is the Migration Script written to add the States in to EvalState:
def forwards(apps, schema_editor):
DcPropertyType = apps.get_model("atlas", "evalstate")
db_alias = schema_editor.connection.alias
DcPropertyType.objects.using(db_alias).bulk_create([
DcPropertyType(name="ACTIVE", friendly_name="EVAL Active",
description="Bundle EVAL State is ACTIVE"),
DcPropertyType(name="INACTIVE", friendly_name="EVAL
InActive",description="Bundle EVAL state is INACTIVE"),
DcPropertyType(name="DELETE", friendly_name="EVAL Delete",
description="Bundle EVAL state is DELETE"),
DcPropertyType(name="NA", friendly_name="EVAL NotApplicable",
description="Bundle EVAL state is not applicable")
])
def backwards(apps, schema_editor):
DcPropertyType = apps.get_model("atlas", "evalstate")
db_alias = schema_editor.connection.alias
DcPropertyType.objects.using(db_alias).filter(name="ACTIVE",
description="Bundle EVAL State is ACTIVE").delete()
DcPropertyType.objects.using(db_alias).filter(name="INACTIVE",
description="Bundle EVAL state is INACTIVE").delete()
DcPropertyType.objects.using(db_alias).filter(name="DELETE",
description="Bundle EVAL state is DELETE").delete()
DcPropertyType.objects.using(db_alias).filter(name="NA",
description="Bundle EVAL state is not applicable").delete()
class Migration(migrations.Migration):
dependencies = [
('atlas', '0012_add_eval_states'),
]
operations = [
migrations.RunPython(forwards, backwards),
]
Does this make sense for the model structure. I do not have any Models
Diagram for the same.
---
Arun
On Monday, August 7, 2017 at 4:13:33 PM UTC+5:30, lemme smash wrote:
>
> you didn't show me a model structure, you just showed another model, so I
> can't give you example without picture of what's going on there
>
> On Monday, August 7, 2017 at 1:39:49 PM UTC+3, Arun S wrote:
>>
>> Can you just give an Example for this taking a Query.
>>
>>
>>
>> On Monday, August 7, 2017 at 3:37:04 PM UTC+5:30, lemme smash wrote:
>>>
>>> i meant EvalState model
>>> if name attribute on it is a ForeignKey you should get corresponding
>>> queryset of model it links to
>>> if it's charfield, you should use text choices
>>>
>>> On Monday, August 7, 2017 at 6:22:50 AM UTC+3, Arun S wrote:
>>>>
>>>> The Models Look like this :
>>>>
>>>> stage_state = models.ForeignKey(EvalState, verbose_name="Eval State")
>>>> class Bundle(AtlasAuditModel, AtlasBaseHelper):^M
>>>> """^M
>>>> Represents the bundle purchased by the customer. The bundle^M
>>>> contains a reference identifier which remains the same if the^M
>>>> the bundle is either upgraded or entended.^M
>>>> A bundle can have 0 or more features.^M
>>>> """^M
>>>> bundle_id = models.CharField(verbose_name="Bundle ID",^M
>>>> max_length=32,^M
>>>> unique=True)^M
>>>> ....
>>>> ....
>>>> ....
>>>> stage_state = models.ForeignKey(*EvalState*, verbose_name="Eval
>>>> State")
>>>>
>>>>
>>>> atlas_bundle;
>>>> atlas_bundle | CREATE TABLE `atlas_bundle` (
>>>> `id` int(11) NOT NULL AUTO_INCREMENT,
>>>> ...
>>>> ....
>>>> ...
>>>> *`stage_state_id` int(11) NOT NULL,*
>>>> PRIMARY KEY (`id`),
>>>> *KEY `atlas_bundle_36c1765e` (`stage_state_id`)*
>>>> ) ENGINE=InnoDB AUTO_INCREMENT=1408 DEFAULT CHARSET=latin1
>>>> ROW_FORMAT=DYNAMIC |
>>>> 19 rows in set (0.01 sec)
>>>>
>>>> desc *evalstate*;
>>>> +---------------+--------------+------+-----+---------+----------------+
>>>> | Field | Type | Null | Key | Default | Extra |
>>>> +---------------+--------------+------+-----+---------+----------------+
>>>> | id | int(11) | NO | PRI | NULL | auto_increment |
>>>> | name | varchar(32) | NO | UNI | NULL | |
>>>> | friendly_name | varchar(32) | NO | UNI | NULL | |
>>>> | description | varchar(255) | YES | | NULL | |
>>>> +---------------+--------------+------+-----+---------+----------------+
>>>> 4 rows in set (0.00 sec)
>>>>
>>>> Whats the Difference in having qs when there is a foriegn Key value?
>>>>
>>>> Arun
>>>>
>>>> On Sunday, August 6, 2017 at 7:48:11 PM UTC+5:30, lemme smash wrote:
>>>>>
>>>>> so, you can maybe show you models structure here?
>>>>> also, if it is a ForeignKey, why you trying to filter qs by string
>>>>> values? I mean Q(name = 'ACTIVE')
>>>>> it's shouldn't work
>>>>>
>>>>>
>>>>> On Sunday, August 6, 2017 at 5:22:21 AM UTC+3, Arun S wrote:
>>>>>>
>>>>>> Yes, name is a foreign key here.
>>>>>
>>>>>
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