该应用程序基于 django / angular 构建。我想根据模型及用户选择的字段生成Excel报告。您可以在下面找到搜索UI。我在django有4个型号。 教练，玩家，参与，其中包含对分会（一对多关系）的外键引用。单个django模型将作为选择输入和模型字段作为选项
models.py
select avg(weight) from table
搜索用户界面（选择下拉列表）
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
用例
##### ###### ####### #############
Club Coach Player Participation
##### ###### ####### #############
name fname fname league
estd lname lname startdate
address age country
HTML
- 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.
Angular JS
<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>
选择输入中的选定字段将发送到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
$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');
});
}
};
视图
[{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'}]
这就是json响应的样子。 JSON响应将转换为excel文件
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)))
帮助
如何根据选定的模型字段获取所有与俱乐部和外国关键数据（教练，玩家，参与者）相关的记录？ 报告示例如上所示。
感谢任何帮助和反馈。
答案 0 :(得分：2)
您尚未提供模型代码。
通常，您可以使用.values()的非常有用的方法.values_list()或QueryManager来获取某些字段的列表。您可以使用__ club__name来引用值的关系。
我认为导出中的一行是指一个玩家。所以，你必须从玩家模型开始建立关系。
示例：
Player.objects.order_by('lname').values('lname', 'coach__fname', 'coach__lname', 'club__name', 'club__league')
ManyToMany字段更难。他们可能需要在QueryManager上进行聚合或extra和select调用。
答案 1 :(得分：2)
试试此代码
def report(request):
query = 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'}]"""
clubs = Club.objects.all()
result = {}
for index, club in enumerate(clubs):
coach_fname = club.coach_set.all().values_list('fname', flat=True)
player_fname = club.player_set.all().values_list('fname', flat=True)
player_lname = club.player_set.all().values_list('lname', flat=True)
participation_leage = club.participation_set.all().values_list('league')
out_put = []
club_details = {"club.name": club.name }
coach_details = {"coach":{"coach.fname": list(coach_fname) }}
player_details = { "player":[ { "player.fname": list(player_fname)},{ "player.lname": list(player_lname)}]}
participation_details = { "participation":[ { "participation.league": list(participation_leage)}]}
out_put.append(club_details)
out_put.append(coach_details)
out_put.append(player_details)
out_put.append(participation_details)
result.update({ ['datarow{}'.format(index)]['Club']: out_put})
return HttpResponse(json.dumps(result))
答案 2 :(得分：2)
实际上有一个实用程序允许您从Django查询集导出csv数据，其所有功能都从链接到查找字段：django-queryset-csv。
用法问题：
from djqscsv import render_to_csv_response
def csv_view(request):
qs = Player.objects.order_by('lname').values('lname', 'coach__fname', 'coach__lname', 'club__name', 'club__league')
return render_to_csv_response(qs)
检查azavea blog以获取更多使用示例。我希望你能发现这有用。