Word count query in Django -

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given model both boolean , textfield fields, want query finds records match criteria , have more "n" words in textfield. possible? e..g.:

class item(models.model):      ...         notes = models.textfield(blank=true,)     has_media = models.booleanfield(default=false)     completed = models.booleanfield(default=false)     ...

this easy:

items = item.objects.filter(completed=true,has_media=true)

but how can filter subset of records "notes" field has more than, say, 25 words?

try this:

item.objects.extra(where=["length(notes) - length(replace(notes, ' ', ''))+1 > %s"], params=[25])

this code uses django's extra queryset method add custom where clause. calculation in where clause counts occurances of "space" character, assuming words prefixed 1 space character. adding 1 result accounts first word.

of course, calculation approximation real word count, if has precise, i'd word count in python.


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