【发布时间】：2016-08-21 20:00:40
【问题描述】：
该应用程序基于 django/angular 构建。我想根据模型和用户选择的字段生成一个excel报告。您可以在下面找到搜索 UI。我在 django 中有 4 个模型。 Coach、Player、Participation，外键引用Club（一对多关系）。各个Django模型将作为选择输入和模型字段作为选项
models.py
from datetime import datetime
from django.db import models
class Club(models.Model):
name = models.CharField(max_length=200)
estd = models.IntegerField()
address = models.CharField(max_length=200)
def __unicode__(self):
return "%s" % self.name
class Coach(models.Model):
fname = models.CharField(max_length=80)
lname = models.CharField(max_length=80)
age = models.IntegerField()
fk = models.ForeignKey(Club, related_name='coaches')
def __unicode__(self):
return "%s" % self.fname
class Player(models.Model):
fname = models.CharField(max_length=80)
lname = models.CharField(max_length=80)
country = models.CharField(max_length=42)
fk = models.ForeignKey(Club, related_name='players')
def __unicode__(self):
return "%s" % self.fname
class Participation(models.Model):
league = models.CharField(max_length=80)
startdate = models.DateTimeField()
fk = models.ForeignKey(Club, related_name='participations')
def __unicode__(self):
return "%s" % self.league
搜索用户界面（选择下拉菜单）
##### ###### ####### #############
Club Coach Player Participation
##### ###### ####### #############
name fname fname league
estd lname lname startdate
address age country
用例
- User have to select at least one field from the Club dropdown.
- User can select one or more fields from Coach, Player and Participation dropdown.
HTML
<select class="form-control" data-ng-model="selected" data-ng-options="item.tablefield for item in coach" ng-click="addField()"></select>
<select class="form-control" data-ng-model="selected" data-ng-options="item.tablefield for item in player" ng-click="addField()"></select>
<select class="form-control" data-ng-model="selected" data-ng-options="item.tablefield for item in participation" ng-click="addField()"></select>
<button type="button" class="btn btn-default" ng-click="report()">Generate report</button>
Angular JS
$scope.club = [{
'tablename': 'Club',
'tablefield': 'name'
},
{
'tablename': 'Coach',
'tablefield': 'estd'
},
{
'tablename': 'Coach',
'tablefield': 'address'
}
];
$scope.coach = [{
'tablename': 'Coach',
'tablefield': 'fname'
},
{
'tablename': 'Coach',
'tablefield': 'lname'
},
{
'tablename': 'Coach',
'tablefield': 'age'
}
];
$scope.player = [{
'tablename': 'Player',
'tablefield': 'fname'
},
{
'tablename': 'Player',
'tablefield': 'lname'
},
{
'tablename': 'Player',
'tablefield': 'country'
}
];
And Similar for participation
$scope.queryfields = [];
// add fields
$scope.addField = function(){
var found = $scope.queryfields.some(function (el) {
return el.value === $scope.selected.tablefield;
});
if (!found) {
var searchkey = $scope.selected.tablename,
searchvalue = $scope.selected.tablefield;
$scope.queryfields.push({
key: searchkey,
value: searchvalue
})
}
else{
console.log('field already exist');
}
};
// SEARCH
$scope.report = function() {
if($scope.queryfields.length > 1){
// post search fields data
$http.post('/api/gamify/advancesearch/', $scope.queryfields)
.success(function (response) {
$scope.queryset = response;
})
.error(function (data, status, headers, config) {
console.log('error');
});
}
};
选择输入中的选定字段被发送到 django 视图以进行查询和结果连接。 发送到 django 视图的数据如下所示
[{u'value': u'name', u'key': u'Club'}, {u'value': u'fname', u'key': u'Coach'}, {u'value': u'lname', u'key': u'Coach'}, {u'value': u'fname', u'key': u'Player'}, {u'value': u'league', u'key': u'Participation'}]
观看次数
def report(request):
qfields = json.loads(request.body)
print query
""" [{u'value': u'name', u'key': u'Club'}, {u'value': u'fname', u'key': u'Coach'}, {u'value': u'lname', u'key': u'Coach'}, {u'value': u'fname', u'key': u'Player'}, {u'value': u'league', u'key': u'Participation'}]"""
# TO-DO
# Get all records of Club (field: name)
# Get all records of Coach (fields: fname, lname) which is reference of Club.
# Get all records of Player (field: fname) which is reference of Club.
# Get all records of Participation (field: league) which is reference of club.
# Export to excel
# Response json object
records = Player.objects.order_by('id').values('id', *qfields)
return HttpResponse(json.dumps(list(records)))
这就是 json 响应的样子。 JSON 响应将被转换为 excel 文件
{
"datarow1":{
"Club":[
{
"club.name":"FC Bar"
},
{
"coach":{
"coach.fname":[
"Hari",
"Shyam",
"Parbe"
]
}
},
{
"player":[
{
"player.fname":[
"King",
"Leo",
"Singh"
]
},
{
"player.lname":[
"Dev",
"Fin"
]
}
]
},
{
"participation":[
{
"participation.league":[
"la liga",
"UEFA"
]
}
]
}
]
},
"datarow2":{
"Club":[
{
"club.name":"FC TU"
},
{
"coach":{
"coach.fname":[
"Xavi",
"Hola",
"Them"
]
}
},
{
"player":[
{
"player.fname":[
"Sab",
"Hi",
"Suz"
]
},
{
"player.lname":[
"Messi",
"Aura"
]
}
]
},
{
"participation":[
{
"participation.league":[
"Italian",
"Premier"
]
}
]
}
]
},
}
帮助
如何根据选定的模型字段获取俱乐部的所有记录和与之相关的外键数据（教练、球员、参与）？ 报告示例如上所示。
感谢任何帮助和反馈。
【问题讨论】：
-
添加您的模型的代码。否则无法为您提供具体答案。
-
models代码已添加！ -
在您的示例输出中，同一俱乐部的球员可以有不同的教练，但这并未反映在您的模型中。为此，您必须在 Player 模型中向 Coacher 添加一个 ForeignKey。
-
@Risadinha 球员和教练在这种情况下没有关系！我只想根据他们的字段获取
Club和相关models (Coach, Player, Participation)的所有记录。够清楚吗？ -
然后修正你的例子。您的模型无法实现您的示例结果。您必须了解自己的数据关系是什么以及要输出什么。
标签： python django excel django-queryset multiple-tables