Python django.contrib.postgres.search.SearchVectorField() Examples

The following are 1 code examples of django.contrib.postgres.search.SearchVectorField(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module django.contrib.postgres.search , or try the search function .
Example #1
Source File: models.py    From lexpredict-contraxsuite with GNU Affero General Public License v3.0 6 votes vote down vote up 
def as_postgresql(self, qn, connection):
        source_field = self.lhs.field
        model = source_field.model
        tsv_column_name = source_field.name + self.tsvector_column_suffix
        model_fields = {i.name: i for i in model._meta.fields}
        tsv_field = model_fields.get(tsv_column_name)

        if tsv_field is None or not isinstance(tsv_field, SearchVectorField):
            # raise RuntimeError('Model "{}" should have "{}" field.'.format(model, tsv_column_name))

            # fail silently - use insensitive contains search
            return IContains(self.lhs, self.rhs).as_sql(qn, connection)

        if source_field.name not in getattr(self.lhs.field.model, 'full_text_search_fields', []):
            # raise RuntimeError('Model "{}" should have "{}" in "{}" class atribute (List).'.format(
            #     model, 'full_text_search_fields', tsv_column_name))

            # fail silently - use insensitive contains search
            return IContains(self.lhs, self.rhs).as_sql(qn, connection)

        return self.get_fts_lookup(qn, connection)