Django psycopg2.errors.StringDataRightTruncation：对于类型字符变化来说值太长（200）

Question

运行django应用程序时遇到上述错误。但究竟需要改变什么？comment_body = models.TextField() 方面很可能是罪魁祸首，因为它存储长度可能不同的 reddit 评论。当我进行 git 克隆并在本地运行它时，奇怪的是它有效。

模型.py

from django.db import models

# Create your models here.
class Subreddit(models.Model):
    # Field for storing the name of a subreddit
    subreddit_name = models.CharField(max_length=200, unique=True)

    # Field for storing the time the model object was last saved
    last_updated = models.DateTimeField(auto_now=True)

class Submission(models.Model):
    subreddit = models.ForeignKey(Subreddit, on_delete=models.CASCADE)

    # The Reddit submission id of the object
    submission_id = models.CharField(max_length=200, unique=True)

    # Reddit Submission URL
    url = models.URLField(max_length=200)

    # Reddit Submission Title
    title = models.CharField(max_length=200)


class SubmissionComment(models.Model):
    # Parent submission object
    submission = models.ForeignKey(Submission, on_delete=models.CASCADE)

    # Text of the comment
    comment_body = models.TextField()

class Meme(models.Model):
    memeurl = models.URLField(max_length=200)

编辑：

新的错误帖子字符更改为 300，并且迁移在本地和 Heroku 上运行。

Answer 1

给出错误：value too long for type character varying(200)您应该查找 a 为max_length200 的模型字段。由于您有多个 max_length 设置为 200 的字段，因此您需要确定哪个模型和字段引发错误。检查堆栈跟踪，运行调试器和/或插入一些调试print(instance.__dict__)。一旦找到罪魁祸首，请将该字段扩展max_length为更大的内容或将其转换为TextField.