#28805: Provide a new database function for RegexpReplace
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Reporter: Joey Wilhelm | Owner: nobody
Type: New feature | Status: new
Component: Database layer | Version: master
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Joey Wilhelm):
Yeah, I was debating the thought of creating some sort of `django-
postgres-regex` package, for this and related functions. But if I could
contribute it to core, why not, ya know?
The implementation relatively easy; I based it off, I believe, Substr.
{{{#!python
from django.db.models import Func, Value
class RegexpReplace(Func):
function = 'REGEXP_REPLACE'
def __init__(self, expression, pattern, replacement, **extra):
if not hasattr(pattern, 'resolve_expression'):
if not isinstance(pattern, str):
raise TypeError("'pattern' must be a string")
pattern = Value(pattern)
if not hasattr(replacement, 'resolve_expression'):
if not isinstance(replacement, str):
raise TypeError("'replacement' must be a string")
replacement = Value(replacement)
expressions = [expression, pattern, replacement]
super().__init__(*expressions, **extra)
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/28805#comment:3>
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