you need to make a migration to apply the index.

https://www.endpoint.com/blog/2016/09/17/executing-custom-sql-in-django-migration

something like 

class Migration(migrations.Migration):

    dependencies = [
        ('blog', '0001_initial'),
    ]

    operations = [
        migrations.RunSQL(
            "CREATE INDEX pgweb_idx ON pgweb USING GIN 
(to_tsvector('english', title || ' ' || body));",
        )
    ]

On Wednesday, August 29, 2018 at 7:16:15 AM UTC-4, Максим Родин wrote:
>
> Hello,
> I'm trying to make the text search index like this:
>
> https://www.postgresql.org/docs/current/static/textsearch-tables.html#TEXTSEARCH-TABLES-INDEX
> :
> "CREATE INDEX pgweb_idx ON pgweb USING GIN (to_tsvector('english', title 
> || ' ' || body));"
>
> I cannot imagine how to do it in django
> Here is my table:
>
> from django.contrib.postgres.indexes import GinIndex
> from django.contrib.postgres.search import SearchQuery
> from django.contrib.postgres.search import SearchVector
> import django.contrib.postgres.search as pg_search
>
>
> class Request(models.Model):
>
>     open_date = models.DateTimeField(verbose_name='Creation Date',
>                                      blank=True)
>     close_date = models.DateTimeField(verbose_name='Closing Date',
>                                       blank=True,
>                                       null=True,
>                                       )
>
>
>     def in_work_time(self):
>         return timezone.now() - self.open_date
>
>
>     def set_open_time(self):
>         self.open_date = timezone.now()
>
>
>     subject = models.CharField(max_length=500,
>                                verbose_name='Request subject')
>     author = models.CharField(max_length=500,
>                               verbose_name='Request author')
>     content = models.TextField(verbose_name='Request content')
>     engineer = models.ForeignKey(User, on_delete=models.PROTECT,
>                                  blank=True,
>                                  verbose_name='Engineer assigned')
>     priority = models.IntegerField(default=10,
>                                    verbose_name='Priority')
>
>
>     def __str__(self):
>         return self.subject
>
>
> And here are my thoughts how it could look like.
> (It doesn't work):
>
>     en_sv = pg_search.SearchVectorField(SearchVector(
>         'subject', 'content', config='english'), null=True)
>     ru_sv = pg_search.SearchVectorField(SearchVector(
>         'subject', 'content', config='russian'), null=True)
>
>
>     class Meta:
>         indexes = [
>             GinIndex(fields=['ru_sv'],
>                      fastupdate=False, name='gin_search_ru_idx'),
>             GinIndex(fields=['en_sv'],
>                      fastupdate=False, name='gin_search_en_idx'),
>      ]
>
>
> Any thoughts?
>
>

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