Calling certain functions when initializing a new mongoengine document
I'm trying to define a Document class that has some fields that have their values automatically calculated when a new document is created.
So far I have succeeded in doing that by extending the __init__ function like this:
class URLDoc(Document):
url = fields.URLField(requierd=True)
domain = fields.StringField(required=True)
screenshot = fields.ImageField(required=True, size=(600, 600, True), thumbnail=(100, 100, True))
def __init__(self, *args, **kwargs):
super(URLDoc, self).__init__(*args, **kwargs)
self.domain = urlparse(self.url).netloc
self.get_and_save_screenshot()
def get_and_save_screenshot(self):
'''Some code to get a screenshot of the website on self.url'''
self.screenshot.put(screenshot_file)
self.save()
This way I was able to create new documents in mongo by just calling new_urldoc = URLDoc(url="some url") and then just new_urldoc.save().
When I started loading existing documents from mongo by URLDoc.objects.get(id="some id") I realized that the __init__ function will be triggered again set new data (take a new screenshot for example) in the document.
I want to implement this but only when the document is new, I looked up everywhere and couldn't find an answer..
Is there a way to call certain functions when initializing a new document as opposed to initializing an existing document?
python mongoengine
asked Nov 20 '18 at 23:23
guyshguysh
62
add a comment |
I'm trying to define a Document class that has some fields that have their values automatically calculated when a new document is created.
So far I have succeeded in doing that by extending the __init__ function like this:
class URLDoc(Document):
url = fields.URLField(requierd=True)
domain = fields.StringField(required=True)
screenshot = fields.ImageField(required=True, size=(600, 600, True), thumbnail=(100, 100, True))
def __init__(self, *args, **kwargs):
super(URLDoc, self).__init__(*args, **kwargs)
self.domain = urlparse(self.url).netloc
self.get_and_save_screenshot()
def get_and_save_screenshot(self):
'''Some code to get a screenshot of the website on self.url'''
self.screenshot.put(screenshot_file)
self.save()
This way I was able to create new documents in mongo by just calling new_urldoc = URLDoc(url="some url") and then just new_urldoc.save().
When I started loading existing documents from mongo by URLDoc.objects.get(id="some id") I realized that the __init__ function will be triggered again set new data (take a new screenshot for example) in the document.
I want to implement this but only when the document is new, I looked up everywhere and couldn't find an answer..
Is there a way to call certain functions when initializing a new document as opposed to initializing an existing document?
python mongoengine
asked Nov 20 '18 at 23:23
guyshguysh
62
add a comment |
I'm trying to define a Document class that has some fields that have their values automatically calculated when a new document is created.
So far I have succeeded in doing that by extending the __init__ function like this:
class URLDoc(Document):
url = fields.URLField(requierd=True)
domain = fields.StringField(required=True)
screenshot = fields.ImageField(required=True, size=(600, 600, True), thumbnail=(100, 100, True))
def __init__(self, *args, **kwargs):
super(URLDoc, self).__init__(*args, **kwargs)
self.domain = urlparse(self.url).netloc
self.get_and_save_screenshot()
def get_and_save_screenshot(self):
'''Some code to get a screenshot of the website on self.url'''
self.screenshot.put(screenshot_file)
self.save()
This way I was able to create new documents in mongo by just calling new_urldoc = URLDoc(url="some url") and then just new_urldoc.save().
When I started loading existing documents from mongo by URLDoc.objects.get(id="some id") I realized that the __init__ function will be triggered again set new data (take a new screenshot for example) in the document.
I want to implement this but only when the document is new, I looked up everywhere and couldn't find an answer..
Is there a way to call certain functions when initializing a new document as opposed to initializing an existing document?
python mongoengine
asked Nov 20 '18 at 23:23
guyshguysh
62
I'm trying to define a Document class that has some fields that have their values automatically calculated when a new document is created.
So far I have succeeded in doing that by extending the __init__ function like this:
class URLDoc(Document):
url = fields.URLField(requierd=True)
domain = fields.StringField(required=True)
screenshot = fields.ImageField(required=True, size=(600, 600, True), thumbnail=(100, 100, True))
def __init__(self, *args, **kwargs):
super(URLDoc, self).__init__(*args, **kwargs)
self.domain = urlparse(self.url).netloc
self.get_and_save_screenshot()
def get_and_save_screenshot(self):
'''Some code to get a screenshot of the website on self.url'''
self.screenshot.put(screenshot_file)
self.save()
This way I was able to create new documents in mongo by just calling new_urldoc = URLDoc(url="some url") and then just new_urldoc.save().
When I started loading existing documents from mongo by URLDoc.objects.get(id="some id") I realized that the __init__ function will be triggered again set new data (take a new screenshot for example) in the document.
I want to implement this but only when the document is new, I looked up everywhere and couldn't find an answer..
Is there a way to call certain functions when initializing a new document as opposed to initializing an existing document?
python mongoengine
python mongoengine
asked Nov 20 '18 at 23:23
guyshguysh
62
asked Nov 20 '18 at 23:23
guyshguysh
62
asked Nov 20 '18 at 23:23
guyshguysh
62
asked Nov 20 '18 at 23:23
guyshguysh
62
asked Nov 20 '18 at 23:23
guyshguysh
62
62
add a comment |
add a comment |
1 Answer
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oldest
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I got it working, I don't know if it's a work around or not but I check for self._id (an id is created only on save) on the init function and if there's none (meaning it's a new document), I set the values.
answered Nov 30 '18 at 7:28
guyshguysh
62
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I got it working, I don't know if it's a work around or not but I check for self._id (an id is created only on save) on the init function and if there's none (meaning it's a new document), I set the values.
answered Nov 30 '18 at 7:28
guyshguysh
62
add a comment |
I got it working, I don't know if it's a work around or not but I check for self._id (an id is created only on save) on the init function and if there's none (meaning it's a new document), I set the values.
answered Nov 30 '18 at 7:28
guyshguysh
62
add a comment |
I got it working, I don't know if it's a work around or not but I check for self._id (an id is created only on save) on the init function and if there's none (meaning it's a new document), I set the values.
answered Nov 30 '18 at 7:28
guyshguysh
62
I got it working, I don't know if it's a work around or not but I check for self._id (an id is created only on save) on the init function and if there's none (meaning it's a new document), I set the values.
answered Nov 30 '18 at 7:28
guyshguysh
62
answered Nov 30 '18 at 7:28
guyshguysh
62
answered Nov 30 '18 at 7:28
guyshguysh
62
answered Nov 30 '18 at 7:28
guyshguysh
62
62
add a comment |
add a comment |
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