use currencies from rates for select on add and edit views.

fix edit template to work with form directly
fixes #2

apps/transactions/forms.py

@@ -1,5 +1,7 @@
 from django import forms  
+import datetime
 from apps.transactions.models import Transaction
+from apps.rates.models import ExchangeRate
 #from datetimepicker.widgets import DateTimePicker
 #from django.contrib.admin.widgets import AdminDateWidget
 
@@ -12,3 +14,12 @@ class TransactionForm(forms.ModelForm):
         # https://stackoverflow.com/a/52702275/1632368
         #date_valid = forms.DateField(widget=AdminDateWidget())
 
+        exchangerates = ExchangeRate.objects.filter(datetime_valid__gt = datetime.datetime.today() - datetime.timedelta(days=7))
+        crypto_currencies = [(x, x) for x in sorted({ex.crypto_currency for ex in exchangerates})]
+        fiat_currencies = [(x, x) for x in sorted({ex.fiat_currency for ex in exchangerates})]
+
+        widgets = {
+            'fiat_currency': forms.Select(choices = fiat_currencies),
+            'crypto_currency': forms.Select(choices = crypto_currencies),
+        }
+

apps/transactions/templates/edit.html

@@ -31,49 +31,49 @@
 	<div class="form-group row">
 	<label class="col-sm-2 col-form-label">Crypto Currency:</label>
 	<div class="col-sm-4">
-		<input type="text" name="crypto_currency" id="id_crypto_currency" required maxlength="10" value="{{ transaction.crypto_currency }}"/> 
+		{{ form.crypto_currency }}
 	</div>
 	</div>
 
 	<div class="form-group row">
 	<label class="col-sm-2 col-form-label">Amount before fee:</label>
 	<div class="col-sm-4">
-		<input type="decimal" name="amount_before_fee" id="id_amount_before_fee" required value="{{ transaction.amount_before_fee }}"/> 
+		{{ form.amount_before_fee }}
 	</div>
 	</div>
 
 	<div class="form-group row">
 	<label class="col-sm-2 col-form-label">Amount after fee:</label>
 	<div class="col-sm-4">
-		<input type="decimal" name="amount_after_fee" id="id_amount_after_fee" required value="{{ transaction.amount_after_fee }}"/> 
+		{{ form.amount_after_fee }}
 	</div>
 	</div>
 
 	<div class="form-group row">
 	<label class="col-sm-2 col-form-label">Exchange Rate:</label>
 	<div class="col-sm-4">
-		<input type="decimal" name="exchange_rate" id="id_exchange_rate" required value="{{ transaction.exchange_rate }}"/> 
+		{{ form.exchange_rate }}
 	</div>
 	</div>
 
 	<div class="form-group row">
 	<label class="col-sm-2 col-form-label">Fiat Currency:</label>
 	<div class="col-sm-4">
-		<input type="text" name="fiat_currency" id="id_fiat_currency" required maxlength="10" value="{{ transaction.fiat_currency }}"/> 
+		{{ form.fiat_currency }}
 	</div>
 	</div>
 
 	<div class="form-group row">
 	<label class="col-sm-2 col-form-label">Fiat Amount:</label>
 	<div class="col-sm-4">
-		<input type="decimal" name="amount" id="id_amount" required value="{{ transaction.amount }}"/> 
+		{{ form.amount }}
 	</div>
 	</div>
 
 	<div class="form-group row">
 	<label class="col-sm-2 col-form-label">Date valid:</label>
 	<div class="col-sm-4">
-		<input type="text" name="date_valid" id="id_date_valid" required value="{{ transaction.date_valid|date:'Y-m-d H:i:s'  }}"/> 
+		{{ form.date_valid }}
 	</div>
 	</div>
 

apps/transactions/views.py

@@ -31,7 +31,8 @@ def show(request):
 @login_required
 def edit(request, id):
     transaction = Transaction.objects.get(id=id, owner=request.user)
-    return render(request,'edit.html', {'transaction':transaction})
+    form = TransactionForm(request.POST or None, instance = transaction)
+    return render(request,'edit.html', {'transaction':transaction, 'form': form})
 
 @login_required
 def update(request, id):