Django 1.7 introduced the JsonResponse objects, which I try to use to return a list of values to my ajax request.
I want to pass
>>> Genre.objects.values('name', 'color')
[{'color': '8a3700', 'name': 'rock'}, {'color': 'ffff00', 'name': 'pop'}, {'color': '8f8f00', 'name': 'electronic'}, {'color': '9e009e', 'name': 'chillout'}, {'color': 'ff8838', 'name': 'indie'}, {'color': '0aff0a', 'name': 'techno'}, {'color': 'c20000', 'name': "drum'n'bass"}, {'color': '0000d6', 'name': 'worldmusic'}, {'color': 'a800a8', 'name': 'classic'}, {'color': 'dbdb00', 'name': 'hiphop'}]
to a JsonResponse object.
However, my attempts fail.
>>> JsonResponse({'foo': 'bar', 'blib': 'blab'}) # works
<django.http.response.JsonResponse object at 0x7f53d28bbb00>
>>> JsonResponse(Genre.objects.values('name', 'color')) # doesn't work
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/home/marcel/Dokumente/django/FlushFM/env/lib/python3.4/site-packages/django/http/response.py", line 476, in __init__
raise TypeError('In order to allow non-dict objects to be '
TypeError: In order to allow non-dict objects to be serialized set the safe parameter to False
This is probably due to the different data structure of Genre.objects.values().
How would this be done right?
[edit]
With safe=False I get
>>> JsonResponse(Genre.objects.values('name', 'color'), safe=False)
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/home/marcel/Dokumente/django/FlushFM/env/lib/python3.4/site-packages/django/http/response.py", line 479, in __init__
data = json.dumps(data, cls=encoder)
File "/usr/lib/python3.4/json/__init__.py", line 237, in dumps
**kw).encode(obj)
File "/usr/lib/python3.4/json/encoder.py", line 192, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/usr/lib/python3.4/json/encoder.py", line 250, in iterencode
return _iterencode(o, 0)
File "/home/marcel/Dokumente/django/FlushFM/env/lib/python3.4/site-packages/django/core/serializers/json.py", line 109, in default
return super(DjangoJSONEncoder, self).default(o)
File "/usr/lib/python3.4/json/encoder.py", line 173, in default
raise TypeError(repr(o) + " is not JSON serializable")
TypeError: [{'color': '8a3700', 'name': 'rock'}, {'color': 'ffff00', 'name': 'pop'}, {'color': '8f8f00', 'name': 'electronic'}, {'color': '9e009e', 'name': 'chillout'}, {'color': 'ff8838', 'name': 'indie'}, {'color': '0aff0a', 'name': 'techno'}, {'color': 'c20000', 'name': "drum'n'bass"}, {'color': '0000d6', 'name': 'worldmusic'}, {'color': 'a800a8', 'name': 'classic'}, {'color': 'dbdb00', 'name': 'hiphop'}] is not JSON serializable
What works is
>>> JsonResponse(list(Genre.objects.values('name', 'color')), safe=False)
<django.http.response.JsonResponse object at 0x7f53d28bb9e8>
But isn't there a better way to generate a dict out of a Model object?
For future reference, .values() returns a ValuesQuerySet that behaves like a iterable full of dictionaries, so using the list() will make a new instance of a list with all the dictionaries in it. With that, you can create a new dict and serialize that.
response = JsonResponse(dict(genres=list(Genre.objects.values('name', 'color'))))
IIRC, it's not safe to have a JSON object that has a list as root and that's probably why Django is complaining. I couldn't find any reference about that now to provide a source, sorry.
To pass nondictionary values to the JsonResponse as you retrieved with Genres.object.values('name','color') you can simple set the safe argument to false and it will return JSON.
from django.http import JsonResponse
def django_json(request):
data = Genres.object.values('name','color')
return JsonResponse(data, safe=False)
That should return a list of JSON of the values you specified. Check out my article How to Return a Json Response with Django for more detailed info on how this works.
Alternatively, if you would like to return a queryset back as JSON you can use Djangos core serializer like this:
from django.core.serializers import serialize
from django.http import JsonResponse
from .models import Genre
def django_models_json(request):
qs = Genre.objects.all()
data = serialize("json", qs, fields=('name', 'color'))
return JsonResponse(data)
This will return the same as above.
Related
I am calling the Giphy API using another wrapper API which returns a list of dictionaries. I am having hard times to serialize the data to return it to AJAX.
The data is returned as InlineResponse200 with three properties.
(docu)
The problem is that my view is not able to return the JSON properly:
# Traceback
[2020-06-23 14:58:54,086] log: ERROR - Internal Server Error: /get_gifs/
Traceback (most recent call last):
File "C:\Users\Jonas\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
response = get_response(request)
File "C:\Users\Jonas\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response
response = self.process_exception_by_middleware(e, request)
File "C:\Users\Jonas\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\Jonas\Desktop\finsphere\finsphere\blog\views.py", line 234, in get_gifs
return JsonResponse(api_response.data[0])
File "C:\Users\Jonas\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\http\response.py", line 554, in __init__
raise TypeError(
TypeError: In order to allow non-dict objects to be serialized set the safe parameter to False.
[23/Jun/2020 14:58:54] "POST /get_gifs/ HTTP/1.1" 500 17874
If I add safe=False it returns TypeError: Object of type Gif is not JSON serializable
I don't get this since api_response.data[0] is a cristal clear dictionary.
Desired outcome: Get the Giphy object logged in the success function of Ajax.
AJAX
(function($) {
$('#btnSearch').on('click', function(e) {
var query = $('#search').val();
console.log(query);
e.preventDefault();
$.ajax({
type: 'post',
async: true,
url: '/get_gifs/',
data: {
'query': query,
'csrfmiddlewaretoken': window.CSRF_TOKEN // from blog.html
},
success: function(response) {
},
error: function(xhr, status, error) {
// shit happens friends!
}
});
});
}(jQuery));
(Inserted my original -free- API key for reproduction)
Views.py
def get_gifs(request):
# create an instance of the API class
api_instance = giphy_client.DefaultApi()
# API Key
api_key = 'NGSKWrBqtIq1rFU1Ka11D879Y1u4Igia'
# Search term
q = request.POST.get('query')
print(q)
# Query parameters
limit = 2
offset = 0
rating = 'g'
lang = 'en'
fmt = 'json'
try:
# Search Endpoint
api_response = api_instance.gifs_search_get(api_key, q, limit=limit, offset=offset, rating=rating, lang=lang, fmt=fmt)
pprint(api_response)
except ApiException as e:
print("Exception when calling DefaultApi->gifs_search_get: %s\n" % e)
return JsonResponse(api_response.data[0])
API fetched object (pprint api_response)
{'data': [{'bitly_gif_url': 'https://gph.is/g/EJWjdvN',
'bitly_url': 'https://gph.is/g/EJWjdvN',
'content_url': '',
'create_datetime': None,
'embed_url': 'https://giphy.com/embed/J0JGg6doLfmV0yZmIB',
'featured_tags': None,
'id': 'J0JGg6doLfmV0yZmIB',
'images': {'downsized': {'height': '250',
'size': '350582',
'url': 'https://media3.giphy.com/media/J0JGg6doLfmV0yZmIB/giphy.gif?cid=ecefd82565bc1664c2b17e3e4b60d88c736d0c6b5a39d682&rid=giphy.gif',
'width': '478'},
'downsized_large': {'height': '250',
'size': '350582',
'url': 'https://media3.giphy.com/media/J0JGg6doLfmV0yZmIB/giphy.gif?cid=ecefd82565bc1664c2b17e3e4b60d88c736d0c6b5a39d682&rid=giphy.gif',
'width': '478'},
'preview_gif': {'height': '134',
'size': '49623',
'url': 'https://media3.giphy.com/media/J0JGg6doLfmV0yZmIB/giphy-preview.gif?cid=ecefd82565bc1664c2b17e3e4b60d88c736d0c6b5a39d682&rid=giphy-preview.gif',
'width': '256'}},
'import_datetime': '2020-06-15 10:01:39',
'is_anonymous': None,
'is_community': None,
'is_featured': None,
'is_hidden': None,
'is_indexable': None,
'is_realtime': None,
'is_removed': None,
'is_sticker': False,
'rating': 'g',
'slug': 'MITEF-mitefarab-asc2020-J0JGg6doLfmV0yZmIB',
'source': 'www.mitefarab.org',
'source_post_url': 'www.mitefarab.org',
'source_tld': '',
'tags': None,
'trending_datetime': '0000-00-00 00:00:00',
'type': 'gif',
'update_datetime': None,
'url': 'https://giphy.com/gifs/MITEF-mitefarab-asc2020-J0JGg6doLfmV0yZmIB',
'user': {'avatar_url': 'https://media2.giphy.com/avatars/MITEF/8FTlysEjtXzx.jpg',
'banner_url': '',
'display_name': 'MITEF Pan Arab',
'profile_url': 'https://giphy.com/MITEF/',
'twitter': None,
'username': 'MITEF'},
'username': 'MITEF'},
{'bitly_gif_url': 'https://gph.is/g/ZdxQQpP',
'bitly_url': 'https://gph.is/g/ZdxQQpP',
'content_url': '',
'create_datetime': None,
'embed_url': 'https://giphy.com/embed/hTJF0O4vDkJsUi1h8Q',
'featured_tags': None,
'id': 'hTJF0O4vDkJsUi1h8Q',
'images': {'downsized': {'height': '480',
'size': '310971',
'url': 'https://media3.giphy.com/media/hTJF0O4vDkJsUi1h8Q/giphy.gif?cid=ecefd82565bc1664c2b17e3e4b60d88c736d0c6b5a39d682&rid=giphy.gif',
'width': '480'},
'preview': {'height': '480',
'mp4': 'https://media3.giphy.com/media/hTJF0O4vDkJsUi1h8Q/giphy-preview.mp4?cid=ecefd82565bc1664c2b17e3e4b60d88c736d0c6b5a39d682&rid=giphy-preview.mp4',
'mp4_size': '15536',
'width': '480'},
'preview_gif': {'height': '480',
'size': '22387',
'url': 'https://media3.giphy.com/media/hTJF0O4vDkJsUi1h8Q/giphy-preview.gif?cid=ecefd82565bc1664c2b17e3e4b60d88c736d0c6b5a39d682&rid=giphy-preview.gif',
'width': '480'}},
'import_datetime': '2019-07-19 22:27:40',
'is_anonymous': None,
'is_community': None,
'is_featured': None,
'is_hidden': None,
'is_indexable': None,
'is_realtime': None,
'is_removed': None,
'is_sticker': False,
'rating': 'g',
'slug': 'RecargaPay-cashback-recargapay-paguetudopelocelular-hTJF0O4vDkJsUi1h8Q',
'source': 'www.recargapay.com.br',
'source_post_url': 'www.recargapay.com.br',
'source_tld': '',
'tags': None,
'trending_datetime': '0000-00-00 00:00:00',
'type': 'gif',
'update_datetime': None,
'url': 'https://giphy.com/gifs/RecargaPay-cashback-recargapay-paguetudopelocelular-hTJF0O4vDkJsUi1h8Q',
'user': {'avatar_url': 'https://media0.giphy.com/avatars/RecargaPay/msKTiPaVkvqd.png',
'banner_url': 'https://media0.giphy.com/headers/RecargaPay/kg023vdaAaWA.gif',
'display_name': 'RecargaPay',
'profile_url': 'https://giphy.com/RecargaPay/',
'twitter': None,
'username': 'RecargaPay'},
'username': 'RecargaPay'}],
'meta': {'msg': 'OK',
'response_id': '65bc1664c2b17e3e4b60d88c736d0c6b5a39d682',
'status': 200},
'pagination': {'count': 2, 'offset': 0, 'total_count': 10}}
I go though your code everything is correct except return JsonResponse(api_response.data[0]) in your views
JsonResponse:
The first parameter, data, should be a dict instance. If the safe parameter is set to False, it can be any JSON-serializable object. official documentation link
When you say
1. safe=True
return JsonResponse(api_response.data[0])
TypeError: In order to allow non-dict objects to be serialized set the safe parameter to False.
The error is obvious api_response.data[0] is not dict, see point 2 error
2
safe=False
return JsonResponse(api_response.data[0], safe=False)
TypeError: Object of type Gif is not JSON serializable
The data api_response.data[0] you provide to JsonResponse is not a dict type object actually, that's why you got error for first point.
when you say safe=False JsonResponse is trying to serialize object but that object is not json serializable, you can trace-back error
File "....\Python\Python38\lib\json\encoder.py", line 179, in default
raise TypeError(f'Object of type {o.__class__.__name__} '
TypeError: Object of type Gif is not JSON serializable
Can be followed the link to see which object can be Json serializable
Coming back to your error.
I don't get this since api_response.data[0] is a cristal clear dictionary.
type of api_response and api_response.data[0]
type(api_response)
<class 'giphy_client.models.inline_response_200.InlineResponse200'>
type(api_response.data[0])
<class 'giphy_client.models.gif.Gif'>
You can follow for giphy_client documentation link for more-details
Solution:
result = api_response.data[0].to_dict() ## NOTE to_dict function of giphy_client.models.gif.Gif
return JsonResponse(result)
render(request, template_name, context=None, content_type=None, status=None, using=None)
render() Combines a given template with a given context dictionary
and returns an HttpResponse object with that rendered text.
You can either use Django defaults JsonResponse class or Django REST framework Response class to return JSON responses.
from django.http import JsonResponse
return JsonResponse(data=api_response.data)
from rest_framework.response import Response
return Response(data=api_response.data)
tried it on the ipython shell and it works just fine.
In [15]: response = Response(api_response.data[0])
In [16]: response
Out[16]: <Response status_code=200, "text/html; charset=utf-8">
response.data gives me the serialized response.
Python has a built in function for converting dicts to json.
import json
data = api_response.data
return render(request, json.dumps(data))
If you use that in your return statement it should return json.
Hi I would like to update some documents that match a query. So for each document I would like to update the field 'parent_id' if and only if this document have an ID greater then i.e. 6
for result in results:
db.update(set('parent_id', current_element_id),
result.get('id') > current_element_id )
error:
Traceback (most recent call last):
File "debug.py", line 569, in <module>
convertxml=parse(xmlfile, force_list=('interface',))
File "debug.py", line 537, in parse
parser.Parse(xml_input, True)
File "..\Modules\pyexpat.c", line 468, in EndElement
File "debug.py", line 411, in endElement
db.update(set('parent_id', current_element_id), result.get('id') > current_element_id )
File "C:\ProgramData\Miniconda3\lib\site-packages\tinydb\database.py", line 477, in update
cond, doc_ids
File "C:\ProgramData\Miniconda3\lib\site-packages\tinydb\database.py", line 319, in process_elements
if cond(data[doc_id]):
TypeError: 'bool' object is not callable
example of document that should be update:
...,
{'URI': 'http://www.john-doe/',
'abbr': 'IDD',
'affiliation': 'USA',
'closed': False,
'created': '2018-06-01 22:49:02.927347',
'element': 'distrbtr',
'id': 7,
'parent_id': None
},...
In the documentation of tinydb I see that I can use set. Otherwise if I don't use Set it will update all the document db.update(dict) which I don't want to.
Using the Docs using write_back to replace part of a document is better
>>> docs = db.search(User.name == 'John')
[{name: 'John', age: 12}, {name: 'John', age: 44}]
>>> for doc in docs:
... doc['name'] = 'Jane'
>>> db.write_back(docs) # Will update the documents we retrieved
>>> docs = db.search(User.name == 'John')
[]
>>> docs = db.search(User.name == 'Jane')
[{name: 'Jane', age: 12}, {name: 'Jane', age: 44}]
implementing it to my situation
for result in results:
if result['parent_id'] != None:
result['parent_id'] = current_element_id
db.write_back(results)
I am performing the following operation:
Prepare some documents: docs = [ doc1, doc2, ... ]. The documents have maybe attachments
I POST to _bulk_docs the list of documents
I get an Exception > Problems updating list of documents (length = 1): (500, ('badarg', '58'))
My bulk_docs is (in this case just one):
[ { '_attachments': { 'image.png': { 'content_type': 'image/png',
'data': 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAM8AAADkCAIAAACwiOf9AAAAA3NCSVQICAjb4U/gAAAgAElEQVR4nO...'}},
'_id': '08b8fc66-cd90-47a1-9053-4f6fefabdfe3',
'_rev': '15-ff3d0e8baa56e5ad2fac4937264fb3f6',
'docmeta': { 'created': '2013-10-01 14:48:24.311257',
'updated': [ '2013-10-01 14:48:24.394157',
'2013-12-11 08:19:47.271812',
'2013-12-11 08:25:05.662546',
'2013-12-11 10:38:56.116145']},
'org_id': 45345,
'outputs_id': None,
'properties': { 'auto-t2s': False,
'content_type': 'image/png',
'lang': 'es',
'name': 'dfasdfasdf',
'text': 'erwerwerwrwerwr'},
'subtype': 'voicemail-st',
'tags': ['RRR-ccc-dtjkqx'],
'type': 'recording'}]
This is the detailed exception:
Traceback (most recent call last):
File "portal_support_ut.py", line 470, in test_UpdateDoc
self.ps.UpdateDoc(self.org_id, what, doc_id, new_data)
File "/home/gonvaled/projects/new-wavilon-portal/python_modules/wav/ps/complex_ops.py", line 349, in UpdateDoc
success, doc = database.UpdateDoc(doc_id, new_data)
File "/home/gonvaled/projects/new-wavilon-portal/python_modules/wav/cdb/core/updater.py", line 38, in UpdateDoc
res = self.SaveDoc(doc_id, doc)
File "/home/gonvaled/projects/new-wavilon-portal/python_modules/wav/cdb/core/saver.py", line 88, in SaveDoc
else : self.bulk_append(doc, flush, update_revision)
File "/home/gonvaled/projects/new-wavilon-portal/python_modules/wav/cdb/core/bulker.py", line 257, in bulk_append
if force_send or flush or not self.timer.use_timer : self.BulkSend(show_progress=True)
File "/home/gonvaled/projects/new-wavilon-portal/python_modules/wav/cdb/core/bulker.py", line 144, in BulkSend
results = self.UpdateDocuments(self.bulk)
File "/home/gonvaled/projects/new-wavilon-portal/python_modules/wav/cdb/core/bulker.py", line 67, in UpdateDocuments
results = self.db.update(bulkdocs)
File "/home/gonvaled/.virtualenvs/python2.7.3-wavilon1/local/lib/python2.7/site-packages/couchdb/client.py", line 764, in update
_, _, data = self.resource.post_json('_bulk_docs', body=content)
File "/home/gonvaled/.virtualenvs/python2.7.3-wavilon1/local/lib/python2.7/site-packages/couchdb/http.py", line 527, in post_json
**params)
File "/home/gonvaled/.virtualenvs/python2.7.3-wavilon1/local/lib/python2.7/site-packages/couchdb/http.py", line 546, in _request_json
headers=headers, **params)
File "/home/gonvaled/.virtualenvs/python2.7.3-wavilon1/local/lib/python2.7/site-packages/couchdb/http.py", line 542, in _request
credentials=self.credentials)
File "/home/gonvaled/.virtualenvs/python2.7.3-wavilon1/local/lib/python2.7/site-packages/couchdb/http.py", line 398, in request
raise ServerError((status, error))
ServerError: (500, ('badarg', '58'))
What does that badarg mean? Is it possible to send attachments when doing _bulk_docs?
The solution is to remove the data:image/png;base64, prefix before sending the attachment to coudhdb.
For a python alternative, see here.
This was answered in our mailing list, repeating the answer here for completeness.
The data field was malformed in two ways;
'data': 'data:image/png;base64,iVBORw0KGgoAA....'
The 'data:image/png;base64,' prefix is wrong, and the base64 part was malformed (CouchDB obviously needs to decode it to store it).
First, a simple question on terms,
Encoding(json.dumps) means, converting something to json string,
decoding(json.loads) means, converting json string to json type(?)
I have a list of objects which I got from
>>> album_image_list = AlbumImage.objects.all().values(*fields)[offset:count]
>>> json.dumps(album_image_list[0], cls=DjangoJSONEncoder)
'{"album": 4, "album__title": "g jfd", "created_at": "2012-08-18T02:23:49Z", "height": 1024.0, "width": 512.0, "url_image": "http://--:8000/media/101ac908-df50-42cc-af6f-b172c8829a31.jpg"}'
but when I try the same on whole list (album_image_list),it fails...
>>> json.dumps(album_image_list, cls=DjangoJSONEncoder)
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/usr/lib/python2.6/json/__init__.py", line 237, in dumps
**kw).encode(obj)
File "/usr/lib/python2.6/json/encoder.py", line 367, in encode
chunks = list(self.iterencode(o))
File "/usr/lib/python2.6/json/encoder.py", line 317, in _iterencode
for chunk in self._iterencode_default(o, markers):
File "/usr/lib/python2.6/json/encoder.py", line 323, in _iterencode_default
newobj = self.default(o)
File "/home/--/virtualenvs/aLittleArtist/lib/python2.6/site-packages/django/core/serializers/json.py", line 75, in default
return super(DjangoJSONEncoder, self).default(o)
File "/usr/lib/python2.6/json/encoder.py", line 344, in default
raise TypeError(repr(o) + " is not JSON serializable")
TypeError: [{'album': 4L, 'album__title': u'g jfd', 'created_at': datetime.datetime(2012, 8, 18, 2, 23, 49, tzinfo=<UTC>), 'height': 1024.0, 'width': 512.0, 'url_image': u'http://--:8000/media/101ac908-df50-42cc-af6f-b172c8829a31.jpg'}, {'album': 4L, 'album__title': u'g jfd', 'created_at': datetime.datetime(2012, 8, 18, 1, 54, 51, tzinfo=<UTC>), 'height': 512.0, 'width': 512.0, 'url_image': u'http://--:8000/media/e85d1cf7-bfd8-4e77-b90f-d1ee01c67392.jpg'}] is not JSON serializable
>>>
Why does it succeed on one element and fails on the list?
If you want to just dump a dictionary to JSON, just use json.dumps. It can easily be made to serialize objects by passing in a custom serialization class - there's one included with Django that deals with datetimes already:
from django.core.serializers.json import DjangoJSONEncoder
json.dumps(mydictionary, cls=DjangoJSONEncoder)
.values() doesn't actually return a list. It returns a ValuesQuerySet which is not serializable by the json module. Try converting album_image_list to a list:
json.dumps(list(album_image_list), cls=DjangoJSONEncoder)
Which DjangoJSONEncoder you are using?
it looks like DjangoJSONEncoder may not support encoding list of results.
Try this:
JSON Serializing Django Models with simplejson
class DateTimeJSONEncoder(json.JSONEncoder):
def default(self, obj):
if isinstance(obj, datetime.datetime):
return obj.isoformat()
else:
return super(DateTimeJSONEncoder, self).default(obj)
updated_at=DateTimeJSONEncoder().encode(p.updated_at)
This will help you to serialize datetime object
For my project, I need to connect to multiple databases and get information from them. I didn't think this would be a problem with web2py, but it was. I thought maybe I need to rebuild the db from scratch, but still had problems. Finally, I went through the introductory 'images' tutorial and changed it to use an alternate mysql database. I still got the same errors, below is the code:
db.py
db = DAL("mysql://root:#localhost/web2py")
images_db = DAL("mysql://root:#localhost/images_test")
images_db.define_table('image',
Field('title', unique=True),
Field('file', 'upload'),
format = '%(title)s')
images_db.define_table('comment',
Field('image_id', images_db.image),
Field('author'),
Field('email'),
Field('body', 'text'))
Then I went to the admin page for 'images' and clicked the 'shell' link under 'controllers' and did the following: (after I went to the index page to generate the 'images':
Shell:
In [1] : print db(images_db.image).select()
Traceback (most recent call last):
File "/home/cody/Downloads/web2py/gluon/contrib/shell.py", line 233, in run
exec compiled in statement_module.__dict__
File "<string>", line 1, in <module>
File "/home/cody/Downloads/web2py/gluon/dal.py", line 7577, in select
fields = adapter.expand_all(fields, adapter.tables(self.query))
File "/home/cody/Downloads/web2py/gluon/dal.py", line 1172, in expand_all
for field in self.db[table]:
File "/home/cody/Downloads/web2py/gluon/dal.py", line 6337, in __getitem__
return dict.__getitem__(self, str(key))
KeyError: 'image'
In [2] : print images_db.has_key('image')
True
In [3] : print images_db
<DAL {'_migrate_enabled': True, '_lastsql': "SET sql_mode='NO_BACKSLASH_ESCAPES';", '_db_codec': 'UTF-8', '_timings': [('SET FOREIGN_KEY_CHECKS=1;', 0.00017380714416503906), ("SET sql_mode='NO_BACKSLASH_ESCAPES';", 0.00016808509826660156)], '_fake_migrate': False, '_dbname': 'mysql', '_request_tenant': 'request_tenant', '_adapter': <gluon.dal.MySQLAdapter object at 0x2b84750>, '_tables': ['image', 'comment'], '_pending_references': {}, '_fake_migrate_all': False, 'check_reserved': None, '_uri': 'mysql://root:#localhost/images_test', 'comment': <Table {'body': <gluon.dal.Field object at 0x2b844d0>, 'ALL': <gluon.dal.SQLALL object at 0x2b84090>, '_fields': ['id', 'image_id', 'author', 'email', 'body'], '_sequence_name': 'comment_sequence', '_plural': 'Comments', 'author': <gluon.dal.Field object at 0x2b84e10>, '_referenced_by': [], '_format': None, '_db': <DAL {...}>, '_dbt': 'applications/images/databases/e1e448013737cddc822e303fe20f8bec_comment.table', 'email': <gluon.dal.Field object at 0x2b84490>, '_trigger_name': 'comment_sequence', 'image_id': <gluon.dal.Field object at 0x2b84050>, '_actual': True, '_singular': 'Comment', '_tablename': 'comment', '_common_filter': None, 'virtualfields': [], '_id': <gluon.dal.Field object at 0x2b84110>, 'id': <gluon.dal.Field object at 0x2b84110>, '_loggername': 'applications/images/databases/sql.log'}>, 'image': <Table {'ALL': <gluon.dal.SQLALL object at 0x2b84850>, '_fields': ['id', 'title', 'file'], '_sequence_name': 'image_sequence', 'file': <gluon.dal.Field object at 0x2b847d0>, '_plural': 'Images', 'title': <gluon.dal.Field object at 0x2b84610>, '_referenced_by': [('comment', 'image_id')], '_format': '%(title)s', '_db': <DAL {...}>, '_dbt': 'applications/images/databases/e1e448013737cddc822e303fe20f8bec_image.table', '_trigger_name': 'image_sequence', '_loggername': 'applications/images/databases/sql.log', '_actual': True, '_tablename': 'image', '_common_filter': None, 'virtualfields': [], '_id': <gluon.dal.Field object at 0x2b848d0>, 'id': <gluon.dal.Field object at 0x2b848d0>, '_singular': 'Image'}>, '_referee_name': '%(table)s', '_migrate': True, '_pool_size': 0, '_common_fields': [], '_uri_hash': 'e1e448013737cddc822e303fe20f8bec'}>
Now I don't quite understand why I am getting errors here, everything appears to be in order. I thought web2py supported multiple databases? Am I doing it wrong? The appadmin works fine, perhaps I'll edit it and get it to raise an error with the code it's generating... any help would be appreciated.
Cody
UPDATE:
I just tried this:
MODELS/DB.PY
db = DAL("mysql://root:#localhost/web2py")
images_db = DAL("mysql://root:#localhost/images_test")
images_db.define_table('image',
Field('title', unique=True),
Field('file', 'upload'),
format = '%(title)s')
images_db.define_table('comment',
Field('image_id', images_db.image),
Field('author'),
Field('email'),
Field('body', 'text'))
CONTROLLERS/DEFAULT.PY
def index():
"""
example action using the internationalization operator T and flash
rendered by views/default/index.html or views/generic.html
"""
if images_db.has_key('image'):
rows = db(images_db.image).select()
else:
rows = 'nope'
#rows = dir(images_db)
return dict(rows=rows)
VIEWS/DEFAULT/INDEX.HTML
{{left_sidebar_enabled,right_sidebar_enabled=False,True}}
{{extend 'layout.html'}}
these are the rows:
{{=rows }}
Again, very confused by all of this. Appreciate any help.
If you want to query the images_db connection, you have to call images_db(), not db(). So, it would be:
images_db(images_db.image).select()