回答編集履歴
2
回答を修正
test
CHANGED
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@@ -82,23 +82,21 @@
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82
82
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83
83
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html = '<p>rank, language, votes</p>\n'
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84
84
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85
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-
if
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85
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+
if len(items):
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86
86
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87
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-
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87
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votes = items.first().votes
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88
88
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89
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-
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89
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rank = 1
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90
90
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91
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-
r
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91
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for item in items:
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92
92
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93
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-
fo
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93
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if votes != item.votes:
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94
94
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95
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-
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95
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rank += 1
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96
96
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97
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-
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97
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votes = item.votes
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98
98
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99
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-
votes = item.votes
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100
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-
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101
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-
html += f'<p>{rank}, {esc(item.name)}, {item.votes}</p>\n'
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99
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html += f'<p>{rank}, {esc(item.name)}, {item.votes}</p>\n'
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102
100
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103
101
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return mark_safe(html)
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104
102
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1
回答を追加
test
CHANGED
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@@ -27,3 +27,131 @@
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27
27
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{% endfor %}
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28
28
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29
29
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```
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30
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+
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31
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32
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33
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+
テンプレートタグで実装する方法を下記に示します。
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34
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35
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36
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37
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```python
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38
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39
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# models.py
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40
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41
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from django.db import models
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42
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43
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44
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45
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46
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47
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class Item(models.Model):
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48
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49
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name = models.CharField('名前', max_length=40)
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50
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+
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51
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votes = models.IntegerField('投票数', default=0)
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52
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53
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class Meta:
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54
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55
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ordering = ('-votes', 'name', )
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56
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57
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def __str__(self):
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58
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59
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return self.name
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60
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61
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62
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63
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# templatetags/item_tags.py
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64
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65
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from django import template
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66
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67
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from django.utils.html import conditional_escape as esc
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68
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+
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69
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from django.utils.safestring import mark_safe
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70
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+
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71
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+
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72
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+
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73
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register = template.Library()
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74
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75
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76
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+
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77
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78
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+
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79
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@register.simple_tag
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80
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+
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81
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def ordered_items(items):
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82
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+
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83
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html = '<p>rank, language, votes</p>\n'
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84
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+
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85
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+
if not len(items):
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86
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+
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87
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return mark_safe(html)
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88
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+
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89
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+
votes = items.first().votes
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90
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+
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91
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+
rank = 1
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92
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+
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93
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for item in items:
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94
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+
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95
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if votes != item.votes:
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96
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+
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97
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rank += 1
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98
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99
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votes = item.votes
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100
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+
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101
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html += f'<p>{rank}, {esc(item.name)}, {item.votes}</p>\n'
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102
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+
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103
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return mark_safe(html)
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104
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+
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105
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+
```
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106
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+
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107
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+
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108
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+
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109
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+
```html
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110
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+
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111
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<!-- templates/item_list.html>
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112
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113
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{% load item_tags %}
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114
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115
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<html>
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116
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+
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117
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<head></head>
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118
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+
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119
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<body>
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120
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121
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{% ordered_items object_list %}
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122
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+
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123
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+
</body>
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124
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+
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125
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</html>
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126
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+
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127
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+
<!-- 下記のようにレンダリングされます。
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|
128
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+
|
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129
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+
<html>
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130
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+
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131
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<head></head>
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132
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+
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133
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+
<body>
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134
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+
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135
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+
<p>rank, language, votes</p>
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136
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+
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137
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+
<p>1, python, 100</p>
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138
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+
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139
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<p>2, c, 90</p>
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140
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+
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141
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<p>3, c#, 80</p>
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142
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+
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143
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+
<p>3, c++, 80</p>
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144
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+
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145
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+
<p>4, rust, 60</p>
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146
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+
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147
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+
<p>5, php, 0</p>
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148
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+
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149
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+
<p>5, ruby, 0</p>
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150
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+
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151
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+
</body>
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152
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+
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153
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+
</html>
|
|
154
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+
|
|
155
|
+
-->
|
|
156
|
+
|
|
157
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+
```
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