1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
from typing import TYPE_CHECKING, Optional
from django.core.exceptions import ImproperlyConfigured, ValidationError
from django.db import models
from strawberry_django.descriptors import model_property
if TYPE_CHECKING:
from django.db.models.manager import RelatedManager
def validate_fruit_type(value: str):
if "rotten" in value:
raise ValidationError("We do not allow rotten fruits.")
class NameDescriptionMixin(models.Model):
name = models.CharField(max_length=20)
description = models.TextField()
class Meta:
abstract = True
class Vegetable(NameDescriptionMixin):
world_production = models.FloatField()
class Fruit(models.Model):
id: Optional[int]
name = models.CharField(max_length=20)
color_id: Optional[int]
color = models.ForeignKey(
"Color",
null=True,
blank=True,
related_name="fruits",
on_delete=models.CASCADE,
)
types = models.ManyToManyField("FruitType", related_name="fruits")
sweetness = models.IntegerField(
default=5,
help_text="Level of sweetness, from 1 to 10",
)
picture = models.ImageField(
null=True,
blank=True,
default=None,
upload_to=".tmp_upload",
)
def name_upper(self):
return self.name.upper()
@property
def name_lower(self):
return self.name.lower()
@model_property
def name_length(self) -> int:
return len(self.name)
class TomatoWithRequiredPicture(models.Model):
name = models.CharField(max_length=20)
picture = models.ImageField(
null=False,
blank=False,
upload_to=".tmp_upload",
)
class Color(models.Model):
fruits: "RelatedManager[Fruit]"
name = models.CharField(max_length=20)
class FruitType(models.Model):
id: Optional[int]
name = models.CharField(max_length=20, validators=[validate_fruit_type])
class User(models.Model):
name = models.CharField(max_length=50)
group_id: Optional[int]
group = models.ForeignKey(
"Group",
null=True,
blank=True,
related_name="users",
on_delete=models.CASCADE,
)
tag = models.OneToOneField("Tag", null=True, on_delete=models.CASCADE)
@property
def group_prop(self) -> Optional["Group"]:
return self.group
def get_group(self) -> Optional["Group"]:
return self.group
class Group(models.Model):
users: "RelatedManager[User]"
name = models.CharField(max_length=50)
tags = models.ManyToManyField("Tag", null=True, related_name="groups")
class Tag(models.Model):
name = models.CharField(max_length=50)
class Book(models.Model):
"""Model with lots of extra metadata."""
title = models.CharField(
max_length=20,
blank=False,
null=False,
help_text="The name by which the book is known.",
)
try:
from django.contrib.gis.db import models as geos_fields
GEOS_IMPORTED = True
class GeosFieldsModel(models.Model):
point = geos_fields.PointField(null=True, blank=True)
line_string = geos_fields.LineStringField(null=True, blank=True)
polygon = geos_fields.PolygonField(null=True, blank=True)
multi_point = geos_fields.MultiPointField(null=True, blank=True)
multi_line_string = geos_fields.MultiLineStringField(null=True, blank=True)
multi_polygon = geos_fields.MultiPolygonField(null=True, blank=True)
geometry = geos_fields.GeometryField(null=True, blank=True)
except ImproperlyConfigured:
GEOS_IMPORTED = False
|
