使用Django将CSV文件中的数据添加到数据库

Question

I have Django model as follows:

class TraxioRelations(models.Model):
    corgemeente = models.CharField(max_length=100, null=True)
    coradres = models.CharField(max_length=255, null=True)
    corhuisnr = models.CharField(max_length=10, null=True, blank=True)

That model creates a table in the database with id as follows:

Now I want to add records from csv file to that model. The csv file is as follows:

I use copy command as follows:

COPY master_traxiorelations(corgemeente, coradres, corhuisnr)
FROM '/path/to/file.csv' CSV HEADER delimiter ';' encoding 'ISO-8859-1';

And when I execute it, I get an error as follows:

[2017-08-21 15:50:49] [22P04] ERROR: extra data after last expected column

But when I add an id to copy command, thus COPY master_traxiorelations(id, corgemeente, coradres, corhuisnr)

And to csv file also:

Then it works fine.

How can I add the data from file to the database, without adding id to copy command and to csv file?

Answer 1

I solved it adding id to the model as follows:

id = models.AutoField(primary_key=True)

Adding id = models.AutoField(primary_key=True) enables auto incrementation of the id. Thus my model looks like :

 class TraxioRelations(models.Model):
    id = models.AutoField(primary_key=True)
    corgemeente = models.CharField(max_length=100, null=True)
    coradres = models.CharField(max_length=255, null=True)
    corhuisnr = models.CharField(max_length=10, null=True, blank=True)

And then copy command works without adding id column in the csv file.

COPY master_traxiorelations(corgemeente, coradres, corhuisnr)
FROM '/path/to/file.csv' CSV HEADER delimiter ';' encoding 'ISO-8859-1';

Hope that this helps if someone else has the same problem.