Django,按日期范围内的指定月份和年份进行过滤 [英] Django, filter by specified month and year in date range
问题描述
我有以下模型
class Destination_Deal(models.Model):
name = models.CharField _(Nombre),max_length = 200)
class Departure_Date(models.Model):
date_from = models.DateField(_('Desde'))
date_to = models.DateField(_('Hasta'))
destination_deal = models.ForeignKey(Destination_Deal,verbose_name = _(Oferta de Destino))
这是表中的实际数据出发日期
id date_from date_to destination_deal_id
1 2012-11-01 2013-03-17 1
2 2012-11-01 2012-12-16 2
3 2012-09-16 2012-10-31 3
4 2012-11-01 2012-12-16 3
5 2013-01-04 2013-01-11 4
如果指定的月份和年份在date_from和date_to之间,我想过滤Destination_Deals。
示例1
月:9月(09)
年份:2012
想要离开日期结果:
ID 3:触摸09/2012的唯一数据范围
示例2
月份:二月(02)
年份:2013
希望离境日期结果:
ID 1:02/2012于03/2012之前
$ b $那么实际上这一天并不重要。如果月份和年份在date_from和date_to之间,即使是一天,也必须过滤。
我想我必须使用像这个,但我不知道该怎么做。
提前感谢!
Miguel
---编辑---
这是对Aamir Adnan,但它不能像我预期的那样工作,因为从2012年11月到2013年3月,ID 1也必须退回,所以2013年1月在。之间。
Departure_Date.objects.all()
[< Departure_Date:id:1 - from:2012-11-01 - 至:2013-03-17>
< Departure_Date:id:2 - 从:2012-11-01 - 至:2012-12-16>
< Departure_Date:id:3 - 从:2012-09-16 - 至:2012 -10-31>
< Departure_Date:id:4 - from:2012-11-01 - to:2012-12-16>
< Departure_Date:id:5 - from:2013 -01-04 - 至:2013-01-11>]
月份:1
年:2013
其中='%(年)s> = YEAR(date_from)AND%(month)s> = MONTH(date_from)\
AND%(year)s <= YEAR(date_to)AND%(month)s <= MONTH(date_to) '%\
{'year':year,'month':month}
Departure_Date.objects.extra(where = [where])
[< Departure_Date:id:5 - from:2013-01-04 - to:2013-01-11>]
检查文档
year = 2012
month = 09
Departure_Date。 object.filter(date_from__year__gte = year,
date_from__month__gte = month,
date_to__year__lte = year,
date_to__month__lte = month)
使用 .extra
的替代方法:
where ='%(year)s> = YEAR(date_from)AND%(month)s> = MONTH(date_from)\
AND%(year)s< = YEAR(date_to )AND%(month)s< = MONTH(date_to)'%\
{'year':year,'month':month}
Departure_Date.objects.extra(where = [where] )
有一个规格
例如:
date_from ='2012-11-01'
date_to ='2013-03-17'
,输入为
年= 2013
月= 1
然后%(month)s> = MONTH(date_from)
条件是错误的,因为第1个月是< date_from
中的第11个月,但年份不同,所以MySQL IF
条件是必需的:
where ='%(year)s> = YEAR(date_from)AND IF(%(year)s> YEAR(date_from),\
IF(%(month)s> MONTH(date_from),%(month)s> = MONTH(date_from),%(month)s< MONTH(date_from)),\
IF %(月)s< MONTH(date_from),%(month)s< MONTH(date_from),%(month)s> = MONTH(date_from))\
AND%(year) < = YEAR(date_to)\
AND%(month)s< = MONTH(date_to)'%\
{'year':year,'month':month}
Departure_Date.objects.extra(where = [where])
I have the following models
class Destination_Deal(models.Model):
name = models.CharField(_("Nombre"),max_length=200)
class Departure_Date(models.Model):
date_from= models.DateField(_('Desde'))
date_to= models.DateField(_('Hasta'))
destination_deal = models.ForeignKey(Destination_Deal,verbose_name = _("Oferta de Destino"))
This is the actual data in the table departure_date
id date_from date_to destination_deal_id
1 2012-11-01 2013-03-17 1
2 2012-11-01 2012-12-16 2
3 2012-09-16 2012-10-31 3
4 2012-11-01 2012-12-16 3
5 2013-01-04 2013-01-11 4
I would like to filter the Destination_Deals if a specified month&year is between date_from and date_to.
Example 1
Month: September (09)
Year: 2012
Wanted departure dates result:
ID 3 : It is the only data range that touch 09/2012
Example 2
Month: February (02)
Year: 2013
Wanted departure dates result:
ID 1 : 02/2012 is before 03/2012
So, the day actually is does not matter. If the month&year is between date_from and date_to, even if it is by one day it must be filter.
I think I must use something like this but I am not sure how to do it.
Thanks in advance! Miguel
---Edit---
This is the test for the answer from Aamir Adnan but it is not working as I expected as ID 1 must be also returned because it goes from November 2012 to March 2013, so January 2013 is between.
Departure_Date.objects.all()
[<Departure_Date: id: 1 - from: 2012-11-01 - to: 2013-03-17>,
<Departure_Date: id: 2 - from: 2012-11-01 - to: 2012-12-16>,
<Departure_Date: id: 3 - from: 2012-09-16 - to: 2012-10-31>,
<Departure_Date: id: 4 - from: 2012-11-01 - to: 2012-12-16>,
<Departure_Date: id: 5 - from: 2013-01-04 - to: 2013-01-11>]
month:1
year:2013
where = '%(year)s >= YEAR(date_from) AND %(month)s >= MONTH(date_from) \
AND %(year)s <= YEAR(date_to) AND %(month)s <= MONTH(date_to)' % \
{'year': year, 'month': month}
Departure_Date.objects.extra(where=[where])
[<Departure_Date: id: 5 - from: 2013-01-04 - to: 2013-01-11>]
Check the documentation
year = 2012
month = 09
Departure_Date.objects.filter(date_from__year__gte=year,
date_from__month__gte=month,
date_to__year__lte=year,
date_to__month__lte=month)
Alternative method using .extra
:
where = '%(year)s >= YEAR(date_from) AND %(month)s >= MONTH(date_from) \
AND %(year)s <= YEAR(date_to) AND %(month)s <= MONTH(date_to)' % \
{'year': year, 'month': month}
Departure_Date.objects.extra(where=[where])
There is a specific case where above query does not yield a desired result.
For example:
date_from='2012-11-01'
date_to='2013-03-17'
and input is
year=2013
month=1
Then %(month)s >= MONTH(date_from)
condition is wrong because month 1 is < month 11 in date_from
but year is different so MySQL IF
condition is required here:
where = '%(year)s >= YEAR(date_from) AND IF(%(year)s > YEAR(date_from), \
IF(%(month)s > MONTH(date_from), %(month)s >= MONTH(date_from), %(month)s < MONTH(date_from)), \
IF(%(month)s < MONTH(date_from), %(month)s < MONTH(date_from), %(month)s >= MONTH(date_from))) \
AND %(year)s <= YEAR(date_to) \
AND %(month)s <= MONTH(date_to)' % \
{'year': year, 'month': month}
Departure_Date.objects.extra(where=[where])
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