Increasing the count field of model whenever a search is applied

问题

My model looks like

class Article(models.Model):
    article_type = models.ForeignKey(
        ArticleType,
        on_delete=models.CASCADE,
        related_name='articles'
    )

    title = models.CharField(
        max_length=100,
        verbose_name='Article Title'
    )

    count = models.IntegerField(
        verbose_name='Frequency Count'
    )

    def __str__(self):
        return self.title

And I have a search api

   class SearchViewSet(RetrieveModelViewSet):
        serializer_class = ArticleSerializer
        queryset = Article.objects.all()
        query = self.request.query_params.get("query")

        final_queryset = search(query,queryset,#some logic)

        #logic to generate serialiser and return serialiser.data
        serialiser = self.get_serializer(final_ueryset, many=True)

search function returns a list of articles i.e

   type(final_queryset) is List

and search function looks like

    def search(search_query, search_queryset, no_of_result):
        def_start = time.time()
        final_matches = []
        startswith_time_start = time.time()
        startswith_matches = search_queryset.filter(name__startswith=search_query).distinct('article_id')[:no_of_result]
        startswith_time_end = time.time()

        for q in startswith_matches:
            if(len(final_matches)<no_of_result):
                final_matches.append(q)
            else:
                break

        if(len(final_matches)<no_of_result):
            contains_time_start = time.time()
            contains_matches = search_queryset.filter(name__contains=search_query).distinct('article_id')[:no_of_result]
            contains_time_end = time.time()

            for q in contains_matches:
                if(len(final_matches)<no_of_result):
                    if(q.entity_id not in entity_covered_ids):
                        final_matches.append(q)
                else:
                    break

        return final_matches

And. I wan't to return the articles order_by('count) as well. Now I wan't to increase the count of top 3 articles from the final_queryset is there a way of doing this.

回答1:

Add created_at field in your model, then use this field to find top 3 item or latest 3 items like this, and then increase count

    queryset = Article.objects.order_by('-created_at')[:3] # it will return a queryset of latest 3 items
    for article in queryset:
        article.count += 1
        article.save()
    serializer = ArticleSerializer(article)

Note: I only shared the logic part here, and i can't test it in my local, but it should work and help you to get the idea. Use it on your need.

回答2:

Figured out a way for doing this

Inserting objects.id in list would help instead of objects as than list can be converted to a queryset i.e

  def search(search_query, search_queryset, no_of_result):
        def_start = time.time()
        final_matches = []
        startswith_time_start = time.time()
        startswith_matches = search_queryset.filter(name__startswith=search_query).distinct('article_id')[:no_of_result]
        startswith_time_end = time.time()

        for q in startswith_matches:
            if(len(final_matches)<no_of_result):
                final_matches.append(q.id)
            else:
                break

        if(len(final_matches)<no_of_result):
            contains_time_start = time.time()
            contains_matches = search_queryset.filter(name__contains=search_query).distinct('article_id')[:no_of_result]
            contains_time_end = time.time()

            for q in contains_matches:
                if(len(final_matches)<no_of_result):
                    if(q.entity_id not in entity_covered_ids):
                        final_matches.append(q.id)
                else:
                    break

        return final_matches

and then

   class SearchViewSet(RetrieveModelViewSet):
        serializer_class = ArticleSerializer
        queryset = Article.objects.all()
        query = self.request.query_params.get("query")

        final_queryset = search(query,queryset,#some logic)

        final_queryset = Article.objects.filter(id__in=final_queryset)
        articles = final_queryset.all()[:3]
        for article in articles:
            article.count += 1
            article.save()

        #logic to generate serialiser and return serialiser.data
        serialiser = self.get_serializer(final_ueryset, many=True)

来源：https://stackoverflow.com/questions/62058526/increasing-the-count-field-of-model-whenever-a-search-is-applied