Django
This commit is contained in:
Victor Alexandrovich Tsyrenschikov
315
apps/dyn_dt/views.py
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315
apps/dyn_dt/views.py
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import requests, base64, json, csv
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from django.shortcuts import render, redirect, get_object_or_404
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from django.contrib.auth.decorators import login_required
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from django.utils import timezone
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from django.http import HttpResponse, JsonResponse
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from django.utils.safestring import mark_safe
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from django.conf import settings
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from django.urls import reverse
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from django.core.paginator import Paginator, PageNotAnInteger, EmptyPage
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from django.urls import reverse
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from django.views import View
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from django.db import models
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from pprint import pp
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from apps.dyn_dt.models import ModelFilter, PageItems, HideShowFilter
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from apps.dyn_dt.utils import user_filter
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from cli import *
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# Create your views here.
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def index(request):
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context = {
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'routes' : settings.DYNAMIC_DATATB.keys(),
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'segment': 'dynamic_dt'
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}
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return render(request, 'dyn_dt/index.html', context)
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def create_filter(request, model_name):
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model_name = model_name.lower()
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if request.method == "POST":
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keys = request.POST.getlist('key')
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values = request.POST.getlist('value')
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for i in range(len(keys)):
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key = keys[i]
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value = values[i]
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ModelFilter.objects.update_or_create(
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parent=model_name,
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key=key,
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defaults={'value': value}
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)
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return redirect(reverse('model_dt', args=[model_name]))
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def create_page_items(request, model_name):
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model_name = model_name.lower()
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if request.method == 'POST':
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items = request.POST.get('items')
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page_items, created = PageItems.objects.update_or_create(
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parent=model_name,
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defaults={'items_per_page':items}
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)
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return redirect(reverse('model_dt', args=[model_name]))
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def create_hide_show_filter(request, model_name):
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model_name = model_name.lower()
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if request.method == "POST":
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data_str = list(request.POST.keys())[0]
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data = json.loads(data_str)
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HideShowFilter.objects.update_or_create(
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parent=model_name,
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key=data.get('key'),
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defaults={'value': data.get('value')}
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)
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response_data = {'message': 'Model updated successfully'}
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return JsonResponse(response_data)
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return JsonResponse({'error': 'Invalid request'}, status=400)
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def delete_filter(request, model_name, id):
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model_name = model_name.lower()
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filter_instance = ModelFilter.objects.get(id=id, parent=model_name)
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filter_instance.delete()
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return redirect(reverse('model_dt', args=[model_name]))
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def get_model_field_names(model, field_type):
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"""Returns a list of field names based on the given field type."""
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return [
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field.name for field in model._meta.get_fields()
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if isinstance(field, field_type)
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]
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def model_dt(request, aPath):
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aModelName = None
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aModelClass = None
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choices_dict = {}
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if aPath in settings.DYNAMIC_DATATB.keys():
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aModelName = settings.DYNAMIC_DATATB[aPath]
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aModelClass = name_to_class(aModelName)
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if not aModelClass:
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return HttpResponse( ' > ERR: Getting ModelClass for path: ' + aPath )
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#db_fields = [field.name for field in aModelClass._meta.get_fields() if not field.is_relation]
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db_fields = [field.name for field in aModelClass._meta.fields]
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fk_fields = get_model_fk_values(aModelClass)
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db_filters = []
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for f in db_fields:
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if f not in fk_fields.keys():
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db_filters.append( f )
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for field in aModelClass._meta.fields:
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if field.choices:
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choices_dict[field.name] = field.choices
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field_names = []
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for field_name in db_fields:
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fields, created = HideShowFilter.objects.get_or_create(key=field_name, parent=aPath.lower())
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if fields.key in db_fields:
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field_names.append(fields)
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model_series = {}
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for f in db_fields:
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f_values = list ( aModelClass.objects.values_list( f, flat=True) )
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model_series[ f ] = ', '.join( str(i) for i in f_values)
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# model filter
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filter_string = {}
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filter_instance = ModelFilter.objects.filter(parent=aPath.lower())
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for filter_data in filter_instance:
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if filter_data.key in db_fields:
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filter_string[f'{filter_data.key}__icontains'] = filter_data.value
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order_by = request.GET.get('order_by', 'id')
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if order_by not in db_fields:
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order_by = 'id'
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queryset = aModelClass.objects.filter(**filter_string).order_by(order_by)
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item_list = user_filter(request, queryset, db_fields, fk_fields.keys())
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# pagination
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page_items = PageItems.objects.filter(parent=aPath.lower()).last()
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p_items = 25
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if page_items:
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p_items = page_items.items_per_page
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page = request.GET.get('page', 1)
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paginator = Paginator(item_list, p_items)
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try:
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items = paginator.page(page)
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except PageNotAnInteger:
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return redirect(reverse('model_dt', args=[aPath]))
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except EmptyPage:
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return redirect(reverse('model_dt', args=[aPath]))
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read_only_fields = ('id', )
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integer_fields = get_model_field_names(aModelClass, models.IntegerField)
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date_time_fields = get_model_field_names(aModelClass, models.DateTimeField)
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email_fields = get_model_field_names(aModelClass, models.EmailField)
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text_fields = get_model_field_names(aModelClass, (models.TextField, models.CharField))
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context = {
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'page_title': 'Dynamic DataTable - ' + aPath.lower().title(),
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'link': aPath,
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'field_names': field_names,
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'db_field_names': db_fields,
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'db_filters': db_filters,
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'items': items,
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'page_items': p_items,
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'filter_instance': filter_instance,
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'read_only_fields': read_only_fields,
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'integer_fields': integer_fields,
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'date_time_fields': date_time_fields,
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'email_fields': email_fields,
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'text_fields': text_fields,
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'fk_fields_keys': list( fk_fields.keys() ),
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'fk_fields': fk_fields ,
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'choices_dict': choices_dict,
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'segment': 'dynamic_dt'
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}
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return render(request, 'dyn_dt/model.html', context)
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@login_required(login_url='/accounts/login/')
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def create(request, aPath):
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aModelClass = None
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if aPath in settings.DYNAMIC_DATATB.keys():
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aModelName = settings.DYNAMIC_DATATB[aPath]
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aModelClass = name_to_class(aModelName)
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if not aModelClass:
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return HttpResponse( ' > ERR: Getting ModelClass for path: ' + aPath )
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if request.method == 'POST':
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data = {}
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fk_fields = get_model_fk(aModelClass)
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for attribute, value in request.POST.items():
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if attribute == 'csrfmiddlewaretoken':
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continue
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# Process FKs
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if attribute in fk_fields.keys():
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value = name_to_class( fk_fields[attribute] ).objects.filter(id=value).first()
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data[attribute] = value if value else ''
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aModelClass.objects.create(**data)
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return redirect(request.META.get('HTTP_REFERER'))
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@login_required(login_url='/accounts/login/')
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def delete(request, aPath, id):
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aModelClass = None
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if aPath in settings.DYNAMIC_DATATB.keys():
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aModelName = settings.DYNAMIC_DATATB[aPath]
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aModelClass = name_to_class(aModelName)
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if not aModelClass:
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return HttpResponse( ' > ERR: Getting ModelClass for path: ' + aPath )
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item = aModelClass.objects.get(id=id)
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item.delete()
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return redirect(request.META.get('HTTP_REFERER'))
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@login_required(login_url='/accounts/login/')
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def update(request, aPath, id):
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aModelClass = None
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if aPath in settings.DYNAMIC_DATATB.keys():
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aModelName = settings.DYNAMIC_DATATB[aPath]
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aModelClass = name_to_class(aModelName)
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if not aModelClass:
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return HttpResponse( ' > ERR: Getting ModelClass for path: ' + aPath )
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item = aModelClass.objects.get(id=id)
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fk_fields = get_model_fk(aModelClass)
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if request.method == 'POST':
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for attribute, value in request.POST.items():
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if attribute == 'csrfmiddlewaretoken':
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continue
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if getattr(item, attribute, value) is not None:
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# Process FKs
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if attribute in fk_fields.keys():
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value = name_to_class( fk_fields[attribute] ).objects.filter(id=value).first()
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setattr(item, attribute, value)
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item.save()
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return redirect(request.META.get('HTTP_REFERER'))
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# Export as CSV
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class ExportCSVView(View):
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def get(self, request, aPath):
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aModelName = None
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aModelClass = None
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if aPath in settings.DYNAMIC_DATATB.keys():
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aModelName = settings.DYNAMIC_DATATB[aPath]
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aModelClass = name_to_class(aModelName)
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if not aModelClass:
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return HttpResponse( ' > ERR: Getting ModelClass for path: ' + aPath )
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db_field_names = [field.name for field in aModelClass._meta.get_fields()]
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fields = []
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show_fields = HideShowFilter.objects.filter(value=False, parent=aPath.lower())
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for field in show_fields:
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if field.key in db_field_names:
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fields.append(field.key)
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else:
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print(f"Field {field.key} does not exist in {aModelClass} model.")
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response = HttpResponse(content_type='text/csv')
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response['Content-Disposition'] = f'attachment; filename="{aPath.lower()}.csv"'
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writer = csv.writer(response)
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writer.writerow(fields) # Write the header
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filter_string = {}
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filter_instance = ModelFilter.objects.filter(parent=aPath.lower())
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for filter_data in filter_instance:
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filter_string[f'{filter_data.key}__icontains'] = filter_data.value
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order_by = request.GET.get('order_by', 'id')
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queryset = aModelClass.objects.filter(**filter_string).order_by(order_by)
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items = user_filter(request, queryset, db_field_names)
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for item in items:
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row_data = []
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for field in fields:
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try:
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row_data.append(getattr(item, field))
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except AttributeError:
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row_data.append('')
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writer.writerow(row_data)
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return response
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