[英]Set ForeignKey in Django Error : matching query does not exist
我想在views.py中為我的表設置ForeignKeys,但我收到了這個錯誤
字詞匹配查詢不存在。
在這行代碼:
word_id = Words.objects.get(pk= wordID),
我不知道出了什么問題,為什么會出現此錯誤? 那么我應該如何設置外鍵呢?
這是我的 model.py 代碼
class Words(models.Model):
word = models.CharField(max_length=50)
phonetic= models.CharField(max_length=50)
audio= models.URLField(max_length = 200)
class Meanings(models.Model):
word_id = models.ForeignKey(Words, on_delete=models.CASCADE)
partOfSpeech = models.CharField(max_length=30)
class Definitions(models.Model):
word_id = models.ForeignKey(Words, on_delete=models.CASCADE)
Meaning_id = models.OneToOneField(Meanings, on_delete=models.CASCADE, primary_key=True)
definition = models.TextField()
def __str__(self):
return self.definition
這是views.py:
def get_details(request):
words = ['hello', 'table', 'windows']
wordID = 0
MeaningID = 0
for word in words:
wordID += 1
print(word)
url = 'https://api.dictionaryapi.dev/api/v2/entries/en/' + word
response = requests.get(url)
if type(response.json()) == list:
response = response.json()[0] # convert list to dictionary
word = response.get('word', {})
phonetics = response.get('phonetics', {})
phonetic = phonetics[0]
print(phonetic)
word_data = Words(
word=response.get('word', {}),
phonetic=phonetic.get('text', {}),
audio=phonetic.get('audio', {})
)
word_data.save()
meanings = response.get('meanings', {})
for i in range(len(meanings)):
MeaningID += 1
meaning_data = Meanings(
word_id=Words.objects.get(pk=wordID),
partOfSpeech=meanings[i].get('partOfSpeech', {})
)
meaning_data.save()
definitions_data = Definitions(
word_id=Words.objects.get(id=wordID),
meaning_id=Meanings.objects.get(id=MeaningID),
definition=meanings[i].get('definition', {})
)
definitions_data.save()
return HttpResponse("data added")
Django model 實例主鍵在刪除所有實例后不會重置為 1 並重置主鍵我在 DB 上使用此查詢
ALTER SEQUENCE al_words_id_seq RESTART WITH 1;
al_words_id_seq
可以替換為yourapp_table_id_seq
。
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