Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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python: can't open file 'C:\\usr\\local\\bin\\django-admin.py': [Errno 2] No such file or directory
Whenever I say "python manage.py startproject myproject" while trying to make a website with Django, I get this error. I'm using python 3.10.4. What can i do? -
Django UUID Field does not autocreate with new entry
I just added a new model where I want to use a UUID for the first time. I run django 3.1.3 on python 3.8.10. Found some questions about this and I am quite certain I did it according to those suggestions. However, when I add an entry to that model (in phpmyadmin web-surface) the UUID is not being added, it just stays empty. However when I create an other one I get the error, that the UUID Field is not allowed to be the same as somewhere else (both empty) wich means at least the unique=True does work. Another thing to mention is, when I create the field using VSCode, normally those fieldnames are being auto-completed, however it is not the case with this one. Thought this might give you a hint what is going on. My model looks like this: from django.db import models import uuid class MQTTTable(models.Model): uuid = models.UUIDField(primary_key = True, default = uuid.uuid4, editable = False, unique = True) description = models.CharField(max_length= 100, default = None) clientID = models.CharField(max_length = 50, default = None) mastertopic = models.CharField(max_length = 200, default = None) -
Django form fields not rendering when grouping fields
I am using Django 4.0.3 with a bootstrap webinterface. For layout reasons I want my fields in a ModelForm to be grouped and I'm doing it with: class UserForm(ModelForm): template_name = "container/form.html" field_groups = [["email", "company"], ["last_name", "first_name"]] grouped_fields = [] class Meta: model = MyUser fields = ["email", "company", "first_name", "last_name"] __init__(self, *args, **kwargs): super(UserForm, self).__init__(*args, **kwargs) def group_fields(self): for group in self._field_groups: group_entry = [] for entry in group: group_entry.append(self.fields[entry]) self.grouped_fields.append(group_entry) in the view I initialize my form and the regroup the fields: def user_form(request): form = UserForm() form.group_fields() render(request, "page.html, {"form", form}) The page.html looks like this: <body> <div id="form-wrapper"> {{ form }} </div> </body> and the form.html looks like this: <form action="" method="POST">{% csrf_token %} {% for field_group in form.grouped_fields %} <div class="row"> {% for field in field_group %} <div class="col"> <label>{{ field.label }}</label> {{ field }} </div> {% endfor %} </div> {% endfor %} However the rendered fields are displayed as string representations of the field objects: Email <django.forms.fields.EmailField object at 0x7f98c00e03a0> Company <django.forms.fields.CharField object at 0x7f98c00e0250> Last name <django.forms.fields.CharField object at 0x7f98c00e0790> First name <django.forms.fields.CharField object at 0x7f98c00e10c0> Whereas a common call renders as expected a form with input fields, but not with the … -
How to filter queryset with mutiple m2m values?
I'm tryna filter Seo model here. I want to get objects that has the brand dependency and the model dependency. Code class SeoListView(generics.ListAPIView): serializer_class = SeoListSerializer def get_queryset(self) -> QuerySet: queryset = Seo.objects.all() dependencies = self.request.query_params.get('dependencies') if dependencies is not None: dependencies = [str(dep).strip() for dep in dependencies.split(',')] print(dependencies) # for dep in dependencies: # query.add(Q(dependencies__dependency__exact=dep), Q.AND) query = reduce(lambda q, dep: q & Q(dependencies__dependency__exact=dep), dependencies, Q()) queryset = queryset.filter(query) return queryset class Dependency(models.Model): dependency = models.SlugField( 'Зависимость', unique=True, help_text='Перечислите зависимости через нижнее подчеркивание. Пример: brand_model' ) def __str__(self) -> str: return f'Зависимость {self.dependency}' class Meta: verbose_name = 'Зависимость' verbose_name_plural = 'Зависимости' class Seo(models.Model): statuses = ( (1, 'Дефолтная'), (2, 'Дополнительная') ) _delimiter = SEOService().delimiter _help_text = ( f'Если вы ввели Купить {_delimiter}, а зависимость - car,' f' то после сохранения получится Купить car машину. ' f'Все {_delimiter} заменяются на соотв. им зависимости.' ) dependencies = models.ManyToManyField( Dependency, verbose_name='Зависимости', blank=True, help_text='Оставьте пустым, если это дефолтный шаблон.' ) h1 = models.CharField( 'Заголовок(h1)', max_length=200, help_text=_help_text ) title = models.CharField( 'Заголовок(title)', max_length=200, help_text=_help_text ) description = models.CharField( 'Описание', max_length=200, help_text=_help_text ) keywords = models.TextField( 'Ключевые слова', help_text=_help_text ) status = models.IntegerField('Статус', choices=statuses, blank=True, help_text='Не трогать руками', null=True) def __str__(self) -> str: return f'Настройка … -
trying to use web scrapper in my application [closed]
DevTools listening on ws://127.0.0.1:1731/devtools/browser/ffe6022f-8d1b-41a0-8ab8-b2bd80fdf8b1 [16224:17484:0517/085953.922:ERROR:device_event_log_impl.cc(214)] [08:59:53.926] USB: usb_device_handle_win.cc:1049 Failed to read descriptor from node connection: A device attached to the system is not functioning. (0x1F) Exception in Tkinter callback Traceback (most recent call last): File "C:\Users\Razer\AppData\Local\Programs\Python\Python310\lib\tkinter\__init__.py", line 1921, in __call__ return self.func(*args) File "C:\Users\Razer\Downloads\WEb scrapper\mysite\polls\views.py", line 245, in start wait.until(EC.presence_of_all_elements_located( File "C:\Users\Razer\AppData\Local\Programs\Python\Python310\lib\site-packages\selenium\webdriver\support\wait.py", line 89, in until raise TimeoutException(message, screen, stacktrace) selenium.common.exceptions.TimeoutException: Message: [9564:3800:0517/090149.183:ERROR:gpu_init.cc(481)] Passthrough is not supported, GL is disabled, ANGLE is [16224:17484:0517/085953.922:ERROR:device_event_log_impl.cc(214)] [08:59:53.926] USB: usb_device_handle_win.cc:1049 Failed to read descriptor from node connection: A device attached to the system is not functioning. (0x1F) Exception in Tkinter callback Traceback (most recent call last): File "C:\Users\Razer\AppData\Local\Programs\Python\Python310\lib\tkinter\__init__.py", line 1921, in __call__ return self.func(*args) File "C:\Users\Razer\Downloads\WEb scrapper\mysite\polls\views.py", line 245, in start wait.until(EC.presence_of_all_elements_located( File "C:\Users\Razer\AppData\Local\Programs\Python\Python310\lib\site-packages\selenium\webdriver\support\wait.py", line 89, in until raise TimeoutException(message, screen, stacktrace) selenium.common.exceptions.TimeoutException: Message: -
EntityChoiceWidget is missing a QuerySet. django-select2
I'm getting this error when using django-select2: EntityChoiceWidget is missing a QuerySet. Define EntityChoiceWidget.model, EntityChoiceWidget.queryset, or override EntityChoiceWidget.get_queryset(). and I don't know what does it mean. {% for field in form %} <div class="form-group{% if field.errors %} has-error{% endif %}"> {{ field|label_with_class:"col-sm-2 control-label" }} <div class="col-xs-4"> X {{ field|input_with_class:"form-control" }} {% for e in field.errors %}<span class="help-block">{{ e }}</span>{% endfor %} </div> </div> {% endfor %} The whole stacktrace points to the site-packages/ directory, so there might be something wrong with my package. I'm using Django 1.11 and django-select2 5.9.0. I tried upgrading django-select2 to the newest version I could use with Django 1.11 (6.3.1) and I'm still getting this error. Why can this error be happening and how can I fix it? -
How to query User model by 'custom' fields? (django.db.models.fields.related_descriptors.ReverseOneToOneDescriptor)
I extended the User model using my account app. Model Account app: from django.db import models from django.contrib.auth.models import User from departments.models import Department class Account(models.Model): user = models.OneToOneField(User, on_delete=models.CASCADE) profile_pic = models.ImageField(upload_to='profile_pics', blank=True) department = models.ForeignKey( Department, on_delete=models.SET_NULL, null=True, related_name='department') def __str__(self): return self.user.username Now I need to send the count of users from the same department to my template... View: from django.contrib.auth.models import User @login_required def home(request): context = { 'title': 'Dashboard', 'department_members': 'department_members': User.objects.filter(department=request.user.account.department).count(), } return render(request, 'app/dashboard.html', context)\ department_members is always 1 even though I have more users on the same department. I figure that the problem is that User don't have department field by default, so I can't say User.account.objects.filter(department=request.user.account.department) I've tried a lot of queries and looked into django docs but I could't find the proper manner on how to retrieve this info. Anyone have the same problem? Any tips on how I can debug/create my query in a better way? Thanks to all in advance! -
Django product update / inline formsets updating a model
I am creating an E-commerce website, I'm having a problem when I'm updating images of the product, I can update the form `but I can't update the images. can you guys tell what am I doing wrong ? this is my code: views.py class ProductEditView(UpdateView): model = Product form = ProductUpdateForm fields='__all__' product_metas = ProductUpdateMetaForm template_name = 'products/update_product.html' product_meta_formset = ProductMetaInlineFormset() meta = product_metas ProductMetaInlineFormset = inlineformset_factory(Product,Image,form = ProductUpdateMetaForm ,extra=5) def form_valid(self, form): response = super(ProductEditView, self).form_valid(form) if self.request.method == 'POST': product_meta_formset = self.ProductMetaInlineFormset(self.request.POST, self.request.FILES, instance=self.object) product_meta_formset.save() return response def get_context_data(self, **kwargs): context = super(ProductEditView, self).get_context_data(**kwargs) context['product_meta_formset'] = self.ProductMetaInlineFormset(instance=self.object) return context forms.py class ProductUpdateMetaForm(forms.ModelForm): class Meta: model = Image fields = ['image', 'is_feature', ] ProductMetaInlineFormset = inlineformset_factory(Product,Image,form = ProductUpdateMetaForm ,extra=5,) update_product.html <div class="container mt-4"> <form enctype="multipart/form-data" action= "." method="POST" class="ui form"> {% csrf_token %} <div class="card"> <div class="card-body"> {{ form.non_form_errors }} {{ form.as_p }} {{ product_meta_formset.non_form_errors }} {{ product_meta_formset.management_form}} {% for form in product_meta_formset %} <div class="d-flex py-1 inline {{ product_meta_formset.prefix }}"> <div>{{form.image.label}}: {{ form.image }}</div> <div class="ml-4">{{form.is_feature.label}}: {{ form.is_feature }}</div> {% if product_meta_formset.can_delete %} <div class="ml-4">{{ form.DELETE }} {{ form.DELETE.label }}</div> {% endif %} </div> {% endfor %} </div> </div> <button type='submit' class = 'ui positive button mtop'>Update product</button> … -
Django convert model objects to dictionary in large volumes results in server timeout
I have been having a problem where a Django server takes forever to return a response. When running with gunicorn in Heroku I get a timeout, so can't receive the response. If I run locally, it takes a while, but after some time it correctly shows the site. Basically I have two models: class Entry(models.Model): #Some stuff charFields, foreignKey, TextField and ManyToMany fields #Eg of m2m field: tags = models.ManyToManyField(Tag, blank=True) def getTags(self): ret = [] for tag in self.tags.all(): ret.append(getattr(tag, "name")) return ret def convertToDict(self): #for the many to many field I run the getter return {'id': self.id, 'tags' : self.getTags(), ... all the other fields ... } class EntryState(models.Model): entry = models.ForeignKey(Entry, on_delete=models.CASCADE) def convertToDict(self): temp = self.entry.convertToDict() temp['field1'] = self.field1 temp['field2'] = self.field1 + self.field3 return temp Then I have a view: def myView(request): entries = list(EntryState.objects.filter(field1 < 10)) dictData = {'entries' : []} for entry in entries: dictData['entries'].append(entry.convertToDict()) context = {'dictData': dictData} return render(request, 'my_template.html', context) The way it was done, the dictData contains the information for all the entries that must be shown in the site. Then, this variable gets loaded into a javascript that will decide how to display the information. The view gets … -
What is the proper documentation for using django channels on azure app services?
I am trying to deploy a web app on azure app service All the http request work just fine as one would expect there just one problem none of the websockets work I am using in memory channels version 2.4.0 and django version 2.2.15 The problem is azure just can not show me proper logs that django shows when running on local server -
django: Query regarding radio buttons
The requirement is that I have a set of questions, and I want the responses to be provided by selecting a value which is rendered using radio buttons. The issue here is, say, we have: Question 1: o option 1 x option 2 o option 3 Question 2: o option 1 o option 2 o option 3 where 'o' represents un-selected options and 'x' - represents an option that has been selected. Now, when trying to check option3 under question 2 it unselects the response to the previous question i.e., Question1. Question 1: o option 1 o option 2 o option 3 Question 2: o option 1 o option 2 x option 3 How do we decouple the radio button responses for each field?? Any help would be appreciated. Thanks!! -
How to force insert custom value in datetimefield(auto_now_add=True) while object creation in Django?
I have a model Test in service A class Test(models.Model): some_field = models.IntegerField() created_at = models.DateTimeField(auto_now_add=True) I am migrating data from a different service B's model to this model (using APIs). Exposed an API in service A which reads from POST data sent from the B, and saves the data in this Test model. Sample data coming from service B data = { 'some_field': 5, 'created_at': '2013-06-26 00:14:27.260524', } Now when I save this data in the db using: obj = Test( some_field=request.POST.get('some_field'), created_at=request.POST.get('created_at'), ) obj.save() The created_at values of saved object is the current time. Not the created_at coming from the API. How to bypass this current time saving in this scenario and save the timestamp coming from the API while creating the object? -
Can I render and extract assets (3D) in browser?
I have a simple app created in Django and my problem is that I need to extract 3D assets from engine (like Unity), this are just files that contains 3D game characters and I need to render them in the browser, is there a Python library that can be integrated under a django web project and no other external web framework library like three.js? -
Image Update is happening in Django
I had used code to update the image in Django, but it doesn't resulted as expected. if request.method == "POST": data = ImageModel.objects.get(pk=id) pid = customer.objects.get(pk=id) fm = CustomerRegisteration(request.POST, request.FILES, instance=pid) if fm.is_valid(): data.image_document.delete() fm.save() This code doesn't work -
file cannot be uploaded and gone (not move to local storage) - DJANGO FORMS
i don't use models form but only form. so when i clicked button upload, the file just gone and not uploaded to my local storage. i don't know why. please help me. this is my code : def homepage(request): if request.method == "POST": form = Audio_store(request.POST, request.FILES) # form = AudioForm(request.POST, request.FILES) if form.is_valid(): handle_uploaded_file(request.FILES['record']) return render(request, "homepage.html", {'form': form}) else: return render(request, "homepage.html") def handle_uploaded_file(f): with open('mp3', 'wb+') as destination: for chunk in f.chunks(): destination.write(chunk) forms.py : from django import forms class Audio_store(forms.Form): record=forms.FileField() urls.py : urlpatterns = [ url(r'^admin/', admin.site.urls), url(r'^decode/$', views.decode), path("", views.homepage, name="upload") ] if settings.DEBUG: #add this urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT) terminal my folder: -
How to render specific template if two app have same template name?
How can I render a specific template in Django? I have created three apps for my project. Each app contains a templates folder. The project structure is as follows: ├───Project ├───app1 │ ├───templates ├───app2 │ ├───templates ├───app3 │ ├───templates In my app2 and app3, I have templates with the same name. I want to render the template from app3 but the template is rendering from app2. I am using the following code. In app3.views.py return render(request, "template_name.html") -
Django System in another Project that is not web application [closed]
I am new to using Django, and I like it. I was working before with python on another project connected to Database and used CURD Methods and JSON format. My Question now can I use Django System (Models and Serializer) in this project? I think it will be better than cursor() and execute() -
how to add second page reportlab in django
my goal is to write the data in the models to a pdf file so that if it doesn't fit on the first page, it will automatically continue on to the second page. is writing me a card again and again on a sheet of code pls help me from django.shortcuts import render from django.http import HttpResponse,HttpResponseRedirect # Create your views here. from .forms import VenueForm from .models import * from django.http import FileResponse import io from reportlab.platypus import PageBreak from reportlab.pdfgen import canvas from reportlab.lib.pagesizes import inch from reportlab.lib.pagesizes import letter def venue_pdf(request): buf = io.BytesIO() c = canvas.Canvas(buf,pagesize=letter,bottomup=0) textob=c.beginText() textob.setTextOrigin(inch,inch) textob.setFont("Helvetica",14) venues = Venue.objects.all() l = [] for i in venues: l.append(i.lname) l.append(i.fname) l.append(i.fan) l.append(i.address) l.append(i.phone) l.append(" ===================================================== ") l.append(" ") for j in range(len(l)//36+1): c.drawText(textob) c.showPage() c.save() buf.seek(0) return FileResponse(buf,as_attachment=True,filena me='east_ariza.pdf') -
Retrieve specific objects from prefetch_related query
I'm working on twitter like app and I have home view which displays tweets and retweets by current user and users who follow that user. I want to show info who retweeted this tweet for all retweets. In retweeted_by column I receive user id. Queryset for this view: def get_queryset(self): user = self.request.user tweets = Tweet.objects.filter(Q(user=user) | Q(user__in=user.followees.all())). \ annotate(action_time=F('pub_date'), retweeted_by=Value(0, output_field=BigIntegerField())). \ select_related('user').prefetch_related('likes', 'retweets', 'children', 'mentioned_users') retweets = Tweet.objects.filter(Q(tweetretweet__user=user) | Q(tweetretweet__user__in=user.followees.all())). \ annotate(action_time=F('tweetretweet__timestamp'), retweeted_by=F('tweetretweet__user')). \ select_related('user').prefetch_related('likes', 'retweets', 'children', 'mentioned_users') return tweets.union(retweets).order_by('-action_time') Template for this view renders all tweets in queryset with inclusion tag: @register.inclusion_tag('tweets/short_tweet_snippet.html', takes_context=True) def render_short_tweet(context, tweet): var_dict = { 'request': context['view'].request, 'tweet': tweet, } # Check if queryset has retweeted_by column # (i have a lot of views which display tweets, but only some show retweet info) try: retweeted_by = tweet.retweeted_by except AttributeError: return var_dict # If retweeted_by value not equal 0 if retweeted_by: # user = tweet.retweets.filter(pk=retweeted_by).get() (hits the db) # user = tweet.retweets.get(pk=retweeted_by) (hits the db) # Doesn't hits the db, but not optimized solution for user in tweet.retweets.all(): if user.pk == retweeted_by: retweeted_user = user var_dict.update(retweeted_user=retweeted_user) return var_dict The problem is when i want to get user object who retweeted specific tweet django makes … -
Django Postgresql annotate group_by (annotate) not working?
I want to query for product with details but currently i am not getting results as I want. class Product(models.Model): . . . price = models.DecimalField() url = models.URLField(max_length=255, null=True, unique=True) merchant = models.ForeignKey(Merchant, on_delete=models.DO_NOTHING) class ProductVariant(models.Model): sku = models.CharField(max_length=255) product = models.ForeignKey(Product, on_delete=models.DO_NOTHING) Query: class Detail(DetailView): model = ProductVariant template_name = "products/cpus_detail.html" def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) context['cpu'] = CPU.objects.filter( model__iexact=context['object'].sku).first() merchant_products = ProductVariant.objects.filter(sku__iregex=rf"\y{context['object'].sku}\y").values('product__merchant').annotate(merchant=Count('product__merchant')) Output of the above query is: <QuerySet [{'product__merchant': 1, 'merchant': 1}, {'product__merchant': 2, 'merchant': 2}]> in above query product is grouped by merchant. And if I want to include other fields of product model: <QuerySet [{'product__merchant': 1, 'product__url': 'some url 1', 'merchant': 1}, {'product__merchant': 2, 'product__url': 'some url 2', 'merchant': 1}, {'product__merchant': 2, 'product__url': 'some url 3', 'merchant': 1}]> now in above query product is no longer grouped by merchant (3 records are returned instead of 2, even though 2 records have product__merchant: 2) what i want is: query that returns grouped records based on merchant (with product fields) -
How to get the related models first objects in a single query in Django?
class Product(models.Model): category = models.ForeignKey(Category, related_name="products_category", null=True, on_delete=models.CASCADE) sku = models.CharField(max_length=200, blank=True, null=True) class ProductVariants(DateTimeModel): name = models.CharField(max_length=200, blank=True, null=True) product = models.ForeignKey(Product, related_name="products_variants", null=True, on_delete=models.CASCADE) products = Product.objects.select_related().all() how to get all the parent model objects with their related model's first object in a single query. [0] and first() is not working. how to fetch that? -
Makemigrations/migrate in django
Could anyone help me solve this problem? I want to add data and time models in Django, but after makemigration, I got this. **You are trying to add a non-nullable field 'MeterReading_DateTime' to mdm_api without a default; we can't do that (the database needs something to populate existing rows). Please select a fix: Provide a one-off default now (will be set on all existing rows with a null value for this column) Quit, and let me add a default in models.py Select an option:** -
How to export data from front Web to CSV files using jquery?
I'm practiced Python+Django edited Web， followed sample trying to export from db data into front Web and I want download CSV file. Here is my whole function. Its download a file, but it shows the for the title and not any data out. Thanks all. Views： sid search funtion def search_by_sid(request,pk=1): sdepartments = Department.objects.all() cdepartments = CDepartment.objects.all() ssid = CourseData.objects.all() if request.method == "POST": sid = request.POST.get("sid").strip() if "," in sid: course = CourseData.objects.filter(sid="NA") sids = sid.split(",") for n in sids: courses = CourseData.objects.filter(sid = n.strip()) course =course | courses else: course = CourseData.objects.filter(sid=sid).order_by("teacher") num = len(course) return render(request, "list.html") return redirect("/") donwload file function： def down_file(request): sdepartments = Department.objects.all() cdepartments = CDepartment.objects.all() ssid = CourseData.objects.all() if request.method == "POST": sid = request.POST.get("sid") dfs = CourseData.objects.filter(sid__in=['sid']).values_list("sid","name","phone","email","sdept") response = HttpResponse(content_type="text/csv") response.write(codecs.BOM_UTF8) response['Content-Disposition'] = 'attachment; filename = "Report.csv"' writer = csv.writer(response) print(writer) writer.writerow(["sid","name","phone","email","sdept"]) for sop in dfs: writer.writerow(sop) return response Templates： button function <form id="sid" action="/bysid/" method="post"> {% csrf_token %} Search：<input name="sid" size="50" placeholder="Search"> <input type="submit" value="Go Search"> <input id="btnType" type="" value="Search"> <button type="button" id="down_file" >Download Files</button> </form> js funtion： $(document).ready(function(){ $("#down_file").click(function(){ $("#btnType").val('accpeted'); <!--Why Null ?!--> $("#sid").submit(); }); }); -
How to get count of more than one field from a table using Django queryset
here is my queryset queryset = (PrathamTeamMembers.objects. select_related('state', 'district', 'block', 'personnel_type'). filter(is_active=1). annotate(total_state=Count('state', distinct=True), total_district=Count('district', distinct=True))) I am expecting result similar to { "total_state": 10 "total_district": 60 } But it is not aggregating instead it is grouping by table PrathamTeamMembers primary key. which I want to avoid. Since it is grouping on table primary key so my queryset giving result simlary to .. [{ "total_state": 1, "total_district": 1 }, { "total_state": 1, "total_district": 1 }, { "total_state": 1, "total_district": 1 } ] -
JSON field sometimes contains string, sometimes object
I'm using Django rest framework to validate JSON received from a banking API (webhook) that sends financial transactions. The serializer has been working for a few years now. The merchant field in the JSON would always contain the merchant as a nested object with the merchant's ID, name etc. But now I am sometimes receiving just the merchant's ID as a string and the JSON now fails validation. How do I set up my serializer to allow eith string or object in the merchant field? serializers.py class MerchantSerializer(serializers.Serializer): id = serializers.CharField(required=True, max_length=50) name = serializers.CharField(required=True, max_length=100) atm = serializers.BooleanField(required=False, allow_null=True) address = AddressSerializer(required=False, allow_null=True) logo = serializers.URLField(required=False, allow_null=True, max_length=500, min_length=None, allow_blank=True) class DataSerializer(serializers.Serializer): account_id = serializers.CharField(required=True, max_length=50) amount = serializers.IntegerField(required=True) created = serializers.DateTimeField() currency = serializers.CharField(required=True, max_length=3) description = serializers.CharField(required=True, max_length=250) id = serializers.CharField(required=True, max_length=50) category = serializers.CharField(required=True, max_length=100) decline_reason = serializers.CharField(required=False, allow_null=True, allow_blank=True, max_length=100) merchant = MerchantSerializer(required=False, allow_null=True) counterparty = CounterpartySerializer(required=False, allow_null=True) metadata = MetadataSerializer(required=False, allow_null=True)
