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I need to calculate the difference between two dates : 

py :

start_date = field.Date()

end_date = field.Date()

xml :

<field name="start_date"/>

<field name="end_date"/>



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Risposta migliore

Hello Yassin,

Try something like this from your python file.

You can call the function in different ways.

Check an example from Button Click.

from datetime import datetime


class YourClass(models.Model):
_inherit = 'your.model'

@api.multi
def your_function(self):
fmt = '%Y-%m-%d'
start_date = self.start_date
end_date = self.end_date
d1 = datetime.strptime(start_date, fmt)
d2 = datetime.strptime(end_date, fmt)
date_difference = d2 - d1


Thanks & Regards

Avinash N K

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Autore

hi Avinash, thanks for your answer

I try to call the function in a compute filds and display the result but it doesn't work this is my code, it dispays 0 :

...

class EcoStage(models.Model):

name =eco.stage

start_date = fields.Date()

end_date = fields.Date()

duree_stage = fields.Integer(string="duree stage", compute='difference_date', store=True)

@api.multi

def difference_date(self):

fmt = '%Y-%m-%d'

start_date = self.start_date

end_date = self.end_date

d1 = datetime.strptime(start_date, fmt)

d2 = datetime.strptime(end_date, fmt)

date_difference = d2 - d1

in xml :

<fields name="duree_stage "/>

Add the 2 fields in the dependency.

---> @api.depends('start_date', 'end_date')

Also d2-d1 not gives an integer value.

So do like this. (d2 - d1).days

And assign the difference value in the computed field.

Like this. self.duree_stage = (d2 - d1).days

Autore

thanks a lot Avinash

Risposta migliore

It can be done easily in odoo 14:

start_date = fields.Date(string="Start date")
end_date = fields.Date(string="End date")
date_diff = fields.Char("Date difference")

@api.constrains('start_date', 'end_date', 'date_diff')
def _date_difference(self):
for record in self:
if record.start_date > record.end_date:
raise ValidationError('Start date should not greater than end date.')
else:
record.date_diff = (record.end_date - record.start_date).days



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Autore Risposta migliore

finally it works 

thanks a lot Avinash you save my life

this is the entier final code :

in .py:

...

class EcoStage(models.Model):

_name ='eco.stage'

start_date = fields.Date()

end_date = fields.Date()

duree_stage = fields.Integer(string="duree stage", compute='difference_date', store=True)

@api.multi

@api.depends('  start_date ',' end_date ')

def difference_date(self):

fmt = '%Y-%m-%d'

start_date = self.start_date

end_date = self.end_date

d1 = datetime.strptime(start_date, fmt)

d2 = datetime.strptime(end_date, fmt)

if d2 >d1 :

self.  duree_stage = (d2 - d1).days

else :

raise ValueError('end date should be superior than start day')

...

in xml :

<fields name="duree_stage "/>


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