Thanks for the response.
I have already seen that expando answer in stackoverflow and I was having
trouble with one thing.
>From stackoverflow:
Before:
class Person(db.Model):
name = db.StringProperty()
age = db.StringProperty() #this will go to int
After
class Person(db.Expando):
pass
for person in Person.all():
person.age = int(person.age)
person.put()
Very after:
class Person(db.Model):
name = db.StringProperty()
age = db.IntegerProperty()
Do I have to write all this in models.py file? Including the for loop? I
put the similar code in models.py file and nothing happened. I want to use
expando but it doesn't work.
On Sunday, May 19, 2019 at 2:30:30 AM UTC+10, Vitaly Bogomolov wrote:
>
> Hi.
>
> The key thing is usage an Expando subclass. For example, as described here:
>
> Change IntegerProperty to FloatProperty of existing AppEngine DataStore
>
> https://stackoverflow.com/questions/4742875/change-integerproperty-to-floatproperty-of-existing-appengine-datastore
>
> Also, these links may be useful:
>
>
> https://medium.com/engineering-workzeit/migrating-versioned-entities-in-google-app-engine-e21938a2e2ec
>
> https://stackoverflow.com/questions/19842671/migrating-data-when-changing-an-ndb-fields-property-type
>
>
> WBR, Vitaly
>
> I have a django project and I want to change property type of one of the
>> models. My current model.py is:
>>
>> class Person(ndb.Model):
>> property_one= ndb.StringProperty()
>> property_two= ndb.StringProperty()
>>
>> and I want to change it to:
>>
>> class Person(ndb.Model):
>> property_one= ndb.TextProperty()
>> property_two= ndb.TextProperty()
>>
>> Both of my properties already have data and I cannot store more than 1500
>> bytes. So I want to convert from string to text without losing any data.
>> How can I achieve this?
>>
>
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