I've spent the last few hours looking at Django Docs and similar questions on here but I'm still unclear on how to tackle the problem...
In essense I want to access the list of email addresses relevent to a certain group, so I can send an email to these customers who are part of this group (named group_one, group_two etc)
class Group(models.Model):
name = models.CharField(primary_key=True)
mailing_list = models.ManyToManyField("Customer", null=True)
class Customer(models.Model):
name = models.CharField()
email = models.EmailField(primary_key=True)
I've tried
group_mail_list = Group.objects.filter(name=group_two)
And this returns an Query Object for group_two but when I try to do a __contains filter I get a error:
TypeError: Related Field has invalid lookup: contains
Anyone help me out? Not sure if it's because it's a many-to-many relationship perhaps?
Thanks in advance :)
What you really want is Customers, then. It seems counter-intuitive on the surface, because you're wanting emails for a Group, but that field is on Customer not Group:
Customer.objects.filter(group__name='group_two').values_list('email')
Related
How to create ArrayField() in TortoiseORM
from common.base_model import AbstractBaseModel
from tortoise.fields import CharField, BooleanField, ForeignKeyField, ArrayField
class City(AbstractBaseModel):
name = CharField(max_length=100, unique=True)
district = CharField(max_length=100, null=True)
state = CharField(max_length=100)
country = ArrayField() # not working
is_verified = BooleanField(default=True)
There is no ArrayField in TortoiseORM, here is an article about fields in TortoiseORM from its documentation.
As you can see, there is no matching field in TortoiseORM, so you have to extend the existing field class.
I suggest extending the basic class Field because your subclass' to_db_value method has to return the same type as extended field class' to_db_value method, and in the class Field it's not specified.
Next time, try harder - read the documentation and make better questions (add more info, show your attempts).
To achieve the result you want,which I'm assuming is having a field to hold multiple countries, you'd have to create another table for your country field and have a many to many relationship between that table and your city table,its a more conventional implementation that wont have you extend the existing field class.
i have to send an email to a user in salesforce using email template.this template contain merge field type of custom object.
Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
mail.setTargetObjectId(user.get(0).id);
mail.setTargetObjectId(user.get(0).Id)
mail.setTemplateId(specifier.get(0).Template_id__c);
mail.saveAsActivity = false;
mail.setWhatId(custom_object.Id);
i read in documentation
If you specify a contact for the targetObjectId field, you can specify a whatId as well. This helps to further ensure that merge fields in the template contain the correct data. The value must be one of the following types:
Account
Asset
Campaign
Case
Contract
Opportunity
Order
Product
Solution
Custom
but if we are sending email to a user not to contact then how to assign a custom object for merge field type in custom objects as in the above code
This is a GIGANTIC whole in their email methods, and one that has annoyed me for years. Particularly given workflow email alerts seem to have no problem sending an email template for a user. Alas, you can't use setWhatId() if your target is a user. But you can vote for them to add that functionality,
I've worked around this I typically create a contact with the same name and email as the user, use it to send the email, and then delete it. This works well, although dealing with validation rules on the contact object can be a challenge. See their dev boards for a full discussion.
You can get the template and replace the merge fields as follows:
EmailTemplate template = [SELECT Id, Subject, HtmlValue, Body FROM EmailTemplate WHERE Name = 'Case Update'];
Case modifiedCase = [SELECT Account.Id, Account.Name, Owner.FirstName, Owner.LastName, CaseNumber, Subject, LastModifiedBy.FirstName, LastModifiedBy.LastName from Case where Id=:modifiedCaseId];
String subject = template.Subject;
subject = subject.replace('{!Case.Account}', modifiedCase.Account.Name);
subject = subject.replace('{!Case.CaseNumber}', modifiedCase.CaseNumber);
subject = subject.replace('{!Case.Subject}', modifiedCase.Subject);
String htmlBody = template.HtmlValue;
htmlBody = htmlBody.replace('{!Case.Account}', modifiedCase.Account.Name);
htmlBody = htmlBody.replace('{!Case.OwnerFullName}', ownerFullName);
...
Messaging.SingleEmailMessage email = new Messaging.SingleEmailMessage();
email.setSubject(subject);
email.setHtmlBody(htmlBody);
Messaging.sendEmail(new Messaging.SingleEmailMessage[] {email});
As far as no new fields are added in the template this will work fine. The admin can mess with the format of the email without the need for code changes.
Not sure this is possible to do, but it depends on the relationship between your custom object and your users that will be receiving the merged emails. Do you have a 1-to-1 relationship between User and CustomObject? If so, perhaps adding a reference to the single custom object instance that each user object references and then adding custom formula fields on your user object with CustomObject__r.CustomField__c would do the trick.
In a custom formula field on your User object:
TEXT(CustomObject__r.CustomField__c)
Then your template could be changed into a User template and the merge fields would be the formula fields that actually pointed to your custom object instance. But if you have some other relationship like 1-to-many or many-to-many between User and CustomObject__c, I think you're out of luck.
I am eager to know how status of Product in Magento get changed/saved?
Requirement-:
Suppose there are existing products which are enabled in Magento...Now If admin Disable particular product from Backend then I need to catch that particular product's Id through code in Magento file system?
So from where Can I get disabled product's id in Magento code? What is the file location & function name for the same? how Can I get that particular id?
Please guide me...
I think the down voting here is a bit unfair. The op is only asking one question - how to get the product id and status of a product after it has been saved.
#Sam - in Magento, instead of finding the exact point in code where a product is being saved, you would typically hook into an event by creating a custom module and use the Magento event/observer facility from within that module.
Have a look through this tutorial which will guide you through the process of creating a module with event/observers: http://www.magentocommerce.com/wiki/5_-_modules_and_development/0_-_module_development_in_magento/customizing_magento_using_event-observer_method
Specifically related to your question: the event you are looking for is catalog_product_save_after.
The xml for your event would look similar to this:
<events>
<catalog_product_save_after>
<observers>
<yourmodule>
<class>Yourcompany_Yourmodule_Model_Observer</class>
<method>catalog_product_save_after</method>
</yourmodule>
</observers>
</catalog_product_save_after>
</events>
Your observer is going to look similar to this:
class Yourcompany_Yourmodule_Model_Observer
{
public function catalog_product_save_after($observer)
{
$product = $obvserver->getEvent()->getProduct();
$productStatus = $product->getStatus();
$productId = $product->getId();
}
}
Note - code is untested
I want to implement some kind of tagging functionality to my app. I want to do something like...
class Item(db.Model):
name = db.StringProperty()
tags = db.ListProperty(str)
Suppose I get a search that have 2 or more tags. Eg. "restaurant" and "mexican".
Now, I want to get Items that have ALL, in this case 2, given tags.
How do I do that? Or is there a better way to implement what I want?
I believe you want tags to be stored as 'db.ListProperty(db.Category)' and then query them with something like:
return db.Query(Item)\
.filter('tags = ', expected_tag1)\
.filter('tags = ', expected_tag2)\
.order('name')\
.fetch(256)
(Unfortunately I can't find any good documentation for the db.Category type. So I cannot definitively say this is the right way to go.) Also note, that in order to create a db.Category you need to use:
new_item.tags.append(db.Category(unicode(new_tag_text)))
use db.ListProperty(db.Key) instead,which stores a list of entity's keys.
models:
class Profile(db.Model):
data_list=db.ListProperty(db.Key)
class Data(db.Model):
name=db.StringProperty()
views:
prof=Profile()
data=Data.gql("")#The Data entities you want to fetch
for data in data:
prof.data_list.append(data)
/// Here data_list stores the keys of Data entity
Data.get(prof.data_list) will get all the Data entities whose key are in the data_list attribute
I have the following model structure
class User(db.Model) :
nickname = db.StringProperty(required=True)
fullname = db.StringProperty(required=True)
class Article(db.Model) :
title = db.StringProperty(required=True)
body = db.StringProperty(required=True)
author = db.ReferenceProperty(User, required=True)
class Favorite(db.Model) :
who = db.ReferenceProperty(User, required=True)
what = db.ReferenceProperty(Article, required=True)
I'd like to display 10 last articles according to this pattern: article.title, article.body, article.author(nickname), info if this article has been already favorited by the signed in user.
I have added a function which I use to get the authors of these articles using only one query (it is described here)
But I don't know what to do with the favorites (I'd like to know which of the displayed articles have been favorited by me using less than 10 queries (I want to display 10 articles)). Is it possible?
You can actually do this with an amortized cost of 0 queries if you denormalize your data more! Add a favorites property to Authors which stores a list of keys of articles which the user has favorited. Then you can determine if the article is the user's favorite by simply checking this list.
If you retrieve this list of favorites when the user first logs in and just store it in your user's session data (and update it when the user adds/removes a favorite), then you won't have to query the datastore to check to see if an item is a favorite.
Suggested update to the Authors model:
class Authors(db.Model): # I think this would be better named "User"
# same properties you already had ...
favorites = db.ListProperty(db.Key, required=True, default=[])
When the user logs in, just cache their list of favorites in your session data:
session['favs'] = user.favorites
Then when you show the latest articles, you can check if they are a favorite just by seeing if each article's key is in the favorites list you cached already (or you could dynamically query the favorites list but there is really no need to).
favs = session['favs']
articles = get_ten_latest_articles()
for article in articles:
if article.key() in favs:
# ...
I think there is one more solution.
Let's add 'auto increment' fields to the User and Article class.
Then, when we want to add an entry to the Favorite class, we will also add the key name in the format which we will be able to know having auto increment value of the signed in user and the article, like this 'UserId'+id_of_the_user+'ArticleId'+id_of_an_article.
Then, when it comes to display, we will easily predict key names of the favorites and would be able to use Favorite.get_by_key_name(key_names).
An alternative solution to dound's is to store the publication date of the favorited article on the Favorite entry. Then, simply sort by that when querying.