Psycopg2ドライバーを使用してPostgreSQLデータベースのLIKEを使用してDjangoでRawSELECTを実行しようとしています。
私はウェブ上で見つけたものをほとんどテストしましたが、何も機能しませんでした。
状況は以下のとおりです。次のようなSELECTを実行する必要があります。
select distinct on (name, adm1.name, adm2.name_local)
gn.geonameid,
case when altnm.iso_language = 'pt' then altnm.alternate_name else gn.name end as name,
adm1.name as zona,
adm2.name_local as municipio
from location_geonameslocal gn
join location_geonameszone adm1 on adm1.code = gn.country || '.' || gn.admin1
join location_geonamesmunicipality adm2 on adm2.code = gn.country || '.' || gn.admin1 || '.' || gn.admin2
left join location_geonamesalternatenames altnm on altnm.geonameid = gn.geonameid
where
(gn.fclass = 'P' or gn.fclass = 'A')
and (altnm.iso_language = 'pt' or altnm.iso_language = 'link' or altnm.iso_language is null or altnm.iso_language = '')
and gn.country = 'PT'
and (gn.name like '%Lisboa%' or altnm.alternate_name like '%Lisboa%')
order by name, adm1.name, adm2.name_local;
SELECTの重要/問題の部分は次のとおりです。
and (gn.name like '%Lisboa%' or altnm.alternate_name like '%Lisboa%')
SELECTをテストするための簡単なビューを作成しました。次のようになります。
def get_citiesjson_view(request):
word = "Lisboa"
term = "%" + word + "%"
cursor = connection.cursor()
cursor.execute("select distinct on (name, adm1.name, adm2.name_local)\
gn.geonameid,\
case when altnm.iso_language = 'pt' then altnm.alternate_name else gn.name end as name,\
adm1.name as zona,\
adm2.name_local as municipio\
from location_geonameslocal gn\
join location_geonameszone adm1 on adm1.code = gn.country || '.' || gn.admin1\
join location_geonamesmunicipality adm2 on adm2.code = gn.country || '.' || gn.admin1 || '.' || gn.admin2\
left join location_geonamesalternatenames altnm on altnm.geonameid = gn.geonameid\
where\
(gn.fclass = 'P' or gn.fclass = 'A')\
and (altnm.iso_language = 'pt' or altnm.iso_language = 'link' or altnm.iso_language is null or altnm.iso_language = '')\
and gn.country = 'PT'\
and (gn.name like %s or altnm.alternate_name like %s)\
order by name, adm1.name, adm2.name_local;", [term, term])
data = cursor.fetchone()
mimetype = 'application/json'
return HttpResponse(data, mimetype)
残念ながら、これは機能せず、機能させる方法が見つかりません。いくつかの手がかり?
更新:このフォームは実際に機能しています:
cursor.execute("... and (gn.name like %s or altnm.alternate_name like %s)... ", ['%'+term+'%', '%'+term+'%'])