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POsearch_fields in Django behaved strangely in Django ModelAdmin
 

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  1. POsearch_fields in Django behaved strangely in Django ModelAdmin
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    <p>I have a django model admin page and wanna use its search function so I defined a search_fields like this:</p> <pre><code> search_fields = ( 'name', 'email', 'vacancy__position__name', 'vacancy__location__name', ) </code></pre> <p>Problem is the 'vacancy' field is nullable, but the search can not find items with null 'vacancy', so I dig into the sql it executed and found the problem:</p> <pre><code>SELECT "testapp_subject"."name", "testapp_subject"."email", FROM "testapp_candidate" INNER JOIN "testapp_subject" ON ("testapp_candidate"."subject_ptr_id" = "testapp_subject"."id") LEFT OUTER JOIN "testapp_vacancy" ON ("testapp_candidate"."vacancy_id" = "testapp_vacancy"."id") LEFT OUTER JOIN "testapp_position" ON ("testapp_vacancy"."position_id" = "testapp_position"."id") INNER JOIN "testapp_location" ON ("testapp_vacancy"."location_id" = "testapp_location"."group_ptr_id") WHERE (UPPER("testapp_subject"."name"::text) LIKE UPPER(%j%) OR UPPER("testapp_subject"."email"::text) LIKE UPPER(%j%) OR UPPER("testapp_position"."name"::text) LIKE UPPER(%j%) OR UPPER("testapp_location"."name"::text) LIKE UPPER(%j%) ) ORDER BY "testapp_candidate"."subject_ptr_id" DESC </code></pre> <p>As you can see, the last INNER JOIN should be LEFT OUTER JOIN.</p> <p>I tried to dig into the sql generating part to see what's going on but the code is too complicated to read. Anyone has a clue on what's going on or is there anyone ran into the same situation?</p> <p>Following is a simplified model structure for my case.</p> <pre><code>class Group(models.Model): pass class Organization(models.Model): name = models.CharField(max_length = 50) class Position(models.Model): name = models.CharField(max_length=80) class Location(Group): name = models.CharField(max_length=80) org = models.ForeignKey(Organization) class Vacancy(models.Model): position = models.ForeignKey(Position) location = models.ForeignKey(Location) date = models.DateField(default=datetime.now()) filled = models.BooleanField(default=False) class Subject(models.Model): org = models.ForeignKey(Organization, verbose_name="organization") name = models.CharField(max_length = 50) email = models.CharField(max_length = 85, null=True, blank=True) class Candidate(Subject): vacancy = models.ForeignKey(Vacancy, null=True, blank=True) </code></pre>
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