Thursday, May 30, 2013

Re: Importing data using loaddata from exported data using dumpdata

I hadn't tried that. I just did though, and still failure.

I decided to upload both the good and bad file and something just struck me. The bad file is 104kb and the good file 3kb! There must be a whole bunch of extra stuff in the bad file!

On Thursday, May 30, 2013 9:50:26 PM UTC+3, ke1g wrote:
Can you load the file using json.load()?  I.e.; is that one of the things that you have already tried?


On Thu, May 30, 2013 at 2:32 PM, Gitonga Mbaya <git...@gmail.com> wrote:
All you suggest I had already tried. Without indent, same result. dumping an xml file, same thing. The only thing I didn't try was loading it in a different project.

I am doing all this on Windows 7 on the same machine.

On Thursday, May 30, 2013 8:57:42 PM UTC+3, ke1g wrote:
Try again without the indent (just for grins).

Are the two systems on the same box, or did you have to transfer it over a network, or via a flash drive, or the like?

If two boxes, is one Windows and the other not?  (Line boundaries differ, though I would hope that the json tools would be proof against that.)

Are there non-ASCII characters in any of the strings?  (Encodings could differ.)

See if you can make it work for one application.   E.g.:

  python manage.py dumpdata books > file.json

and in the other project:

  loaddata fixture/file.json

(You should be able to leave off the fixture/ if that's where you have put it.)

Try again in the XML format:

  python manage.py dumpdata --format xml > file.xml

  python manage.py loaddata file.xml

(I'm pretty sure that loaddata figures out the format for itself, at least it doesn't document a format switch.  I've never tried this, so it's possible that loaddata only supports JSON.)

Bill


On Thu, May 30, 2013 at 1:38 PM, Gitonga Mbaya <git...@gmail.com> wrote:
Bill,

This is are the exact steps I follow:

python manage.py dumpdata --indent=4 > fixtures/data.json

python manage.py loaddata fixtures/data.json

That is when I get:

DeserializationError: No JSON object could be decoded

I checked the json code using http://jsonlint.com/ and it was reported as being valid. (The json code is reproduced at the end of this post for your info)

I openned the file using Notepad++, copied it all into regular Notepad.exe and then saved it as a new json file. When I do the loaddata command with that new file it works just fine.

When I copy paste the code from Notepad.exe back into a new file on Notepad++ and save that, the resultant file works just fine as well.

This link: http://stackoverflow.com/questions/8732799/django-fixtures-jsondecodeerror suggested that the unicode text file needed to be converted to ascii. It was also pointed out that the file in a hexeditor should start with 5B and not any other byte. Sure enough, in the hexeditor, the file straight from the dump began with FF FE, but the notepad saved json file began with 5B. Could it be my setup that is at fault producing the wrong json file dump?

[
    {
        "pk": 1, 
        "model": "books.publisher", 
        "fields": {
            "state_province": "MA", 
            "city": "Cambdridge", 
            "name": "O'Reilly Media", 
            "country": "USA", 
            "website": "www.oreilly.com", 
            "address": "73 Prince Street"
        }
    }, 
{
        "pk": 2, 
        "model": "books.publisher", 
        "fields": {
            "state_province": "CA", 
            "city": "Bakersfield", 
            "name": "Randomn House", 
            "country": "USA", 
            "website": "www.randomn.com", 
            "address": "234 Hollywood Boulevard"
        }
    }, 
{
        "pk": 3, 
        "model": "books.publisher", 
        "fields": {
            "state_province": "NY", 
            "city": "New York", 
            "name": "Pearson Vue", 
            "country": "USA", 
            "website": "www.pearson.com", 
            "address": "1 Wall Street"
        }
    }, 
    {
        "pk": 1, 
        "model": "books.author", 
        "fields": {
            "first_name": "Eric", 
            "last_name": "Meyer", 
            "email": ""
        }
    }, 
    {
        "pk": 2, 
        "model": "books.author", 
        "fields": {
            "first_name": "Seth", 
            "last_name": "Meyer", 
            "email": ""
        }
    }, 
        {
        "pk": 3, 
        "model": "books.author", 
        "fields": {
            "first_name": "Vincent", 
            "last_name": "Meyer", 
            "email": ""
        }
    }, 
{
        "pk": 1, 
        "model": "books.book", 
        "fields": {
            "publisher": 1, 
            "authors": [
                1
            ], 
            "isbn": 123456789, 
            "publication_date": null, 
            "title": "CSS: The Definitive Guide"
        }
    },
    {
        "pk": 2, 
        "model": "books.book", 
        "fields": {
            "publisher": 3, 
            "authors": [
                2
            ], 
            "isbn": 987654321, 
            "publication_date": null, 
            "title": "Primer on Banking"
        }
    },
   {
        "pk": 3, 
        "model": "books.book", 
        "fields": {
            "publisher": 2, 
            "authors": [
                1,2
            ], 
            "isbn": 543216789, 
            "publication_date": null, 
            "title": "Frolicking on the Beach"
        }
    }
]

On Sunday, March 4, 2012 12:04:08 AM UTC+3, Vincent Bastos wrote:
Hi,

I am having trouble importing data using loaddata from a .json file that I created from a dumpdata export. I have a production application which runs MySQL on one server and a development machine which runs SQLite. I simple executed ./manage.py dumpdata > file.json on the production machine, but when I execute ./manage.py loaddata file.json I get the error:

ValueError: No JSON object could be decoded

I would appreciate some sort of trouble shooting direction, as I could not find anything that would help me in the docs.

Cheers

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