Multiple calls

[Soumen Khatua]

Hi Folks,

Actually I want to load the csv file for first time only afterwards I don't want to load the csv files,but everytime when i'm calling the url the same csv fie is loading for the same operation.How I can restrict it for multiple loadings?

Here is my code:

class AutocompleteView(APIView):
    def __init__(self):
        self.keys = []
        with open("search_terms_converteds.csv",'r') as file:
            reader = csv.reader(file)
            for row in reader:
                self.keys.append(row[1])
            print("constructor execution")

        global t
        t = Trie()
        t.formTrie(self.keys)

    def post(self,request):
        key = request.data
        print("key:",key)
        suggested_word = t.printAutoSuggestions(key)
        return Response(suggested_word, status = status.HTTP_200_OK)

Thank you in advance

Regards,

Soumen

[Kasper Laudrup]

Hi Soumen,

On 17/02/2020 14.31, Soumen Khatua wrote:
> Hi Folks,
> Actually I want to load the csv file for first time only afterwards I
> don't want to load the csv files,but everytime when i'm calling the url
> the same csv fie is loading for the same operation.How I can restrict it
> for multiple loadings?

As a quick and dirty solution, you could probably use a class variable:

https://docs.python.org/3/tutorial/classes.html#class-and-instance-variables

But a nicer way would be to have some kind of service or similar that
the view could call or perhaps abstract the CSV file as a Django model.

Kind regards,

Kasper Laudrup

[Soumen Khatua]

Okay.

Is it possible to load the csv file one time do the POST or any request multiple times without loading the same file.Of course If it is in same class??

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[Kasper Laudrup]

Hi Soumen,

On 17/02/2020 14.51, Soumen Khatua wrote:
> Okay.
> Is it possible to load the csv file one time do the POST or any request
> multiple times without loading the same file.Of course If it is in same
> class??
>

Yes, I just gave you some ideas on how that could be done.

Kind regards,

Kasper Laudrup

[Soumen Khatua]

Yeah, I'm trying to do it in your way but somehow it's not working in my script.

Thanks for your valuable time.

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[tribhuvan kishor]

i faced the same problem while i was dealing with CSV file.

i gave a unique file in csv to make a check on the particular entry. by this way, i avoided multiple entries in my database

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regards 
Tribhuvan Kishor Bhaskar

9818078761

[tribhuvan kishor]

unique field in CSV

[Soumen Khatua]

Could you send me any code snippet or any link,Please?

Thank you for your response

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[tribhuvan kishor]

add a unique field in csv and 

class AutocompleteView(APIView):
    def __init__(self):
        self.keys = []
        with open("search_terms_converteds.csv",'r') as file:
            reader = csv.reader(file)
            for row in reader:

               if row.get("perticular unique id field").exist():

                    print("row already exist")

                else:

                self.keys.append(row[1])
            print("constructor execution")

        global t
        t = Trie()
        t.formTrie(self.keys)

    def post(self,request):
        key = request.data
        print("key:",key)
        suggested_word = t.printAutoSuggestions(key)
        return Response(suggested_word, status = status.HTTP_200_OK)

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[tribhuvan kishor]

its possible if manipulation possible in CSV

[Soumen Khatua]

Actually my requirement is different it's like If anyone call the this class first time then entire script will be execute. Afterwards if any one wants to POST or any request then the constructor should not be execute only the specefied request will be execute. otherwise if the csv file will load each and everytime then it will take lots of time.

Thank you

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[maninder singh Kumar]

Hi Soumen,
Where is the Csv file loading ?
You could try return redirect also if the problem is due to continued resubmission.

Sent from my iPad

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[Soumen Khatua]

The CSV file is in project folder.Could you send me any code snippet,Please?

Thanks for your time.

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[Soumen Khatua]

the CSV file is loading inside the AutoComplete(class) constructor

[Kasper Laudrup]

Hi Soumen,

On 17/02/2020 14.59, Soumen Khatua wrote:
> Yeah, I'm trying to do it in your way but somehow it's not working in my
> script.
>

Which way?

I didn't give you any way to do it, I gave you three ideas and I would
be very interested to hear what would work out best.

I definitely find the "class member/singleton" kind of way a dirty hack
that I would personally avoid (views shouldn't have any state in the
first place).

But it would be very interesting to hear how you've approached the
service and custom model ideas.

Would you care to share the code where you've tried that approach?

Kind regards,

Kasper Laudrup