我有Source_page和Target_Page应用程序。在Source_page应用程序视图中，我使用表单来选择“数据库”，“架构”和“表”下拉列表，并且每个下拉列表均在选择一个之后出现。
有一个TableStructure类需要在选择一个表进行某些处理后调用。这些过程完成后，我要重定向URL“ / targetSource /”。
有人可以帮忙吗？这是代码文件
Views.py
class DBForm(forms.Form):
database = forms.ChoiceField()
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.fields['database'].choices = self._get_databases()
def _get_databases(self):
self.pgObj = Postgres(server="localhost",user="postgres",password="*****",port=5433)
dbList = self.pgObj.connect()
dbChoiceList = getChoiceList(dbList)
return dbChoiceList
class SchemaForm(DBForm):
schema = forms.ChoiceField()
def __init__(self, database, *args, **kwargs):
super().__init__(*args, **kwargs)
self.fields['database'].initial = database
# self.fields['database'].widget.attrs['disabled'] = True
self.fields['schema'].choices = self._get_schemas(database)
def _get_schemas(self, database):
# TODO Do NOT forget to escape "database" here to prevent injections
schemaList= self.pgObj.schemaList(database)
schema = getChoiceList(schemaList)
return schema
class TableForm(SchemaForm):
table = forms.ChoiceField()
def __init__(self, database, schema, *args, **kwargs):
super().__init__(database, *args, **kwargs)
self.fields['schema'].initial = schema
# self.fields['schema'].widget.attrs['disabled'] = True
self.fields['table'].choices = self._get_tables(database, schema)
def _get_tables(self, database, schema):
# TODO Do NOT forget to escape "database" here to prevent injections
tableList = self.pgObj.tableList(schema)
table = getChoiceList(tableList)
return table
class TableStructure(TableForm):
def __init__(self, database, schema, table, *args, **kwargs):
super().__init__(database, schema, *args, **kwargs)
self.fields['table'].initial = table
self.fields['schema'].widget.attrs['disabled'] = True
self.fields['database'].widget.attrs['disabled'] = True
self._get_tables_structure(database, schema, table)
# self.fields['acknowledge'].widget.attrs['disabled'] = True
def _get_tables_structure(self,database, schema, table):
# print("INSIDE GET TABLE STRUCTURE")
# return HttpResponseRedirect('127.0.0.1:8000/targetSource/')
# return redirect('http://127.0.0.1:8000/targetSource/')
# return redirect('targetCreds')
data = self.pgObj.getTableData(schema, table)
print("writing File ",table)
data.to_csv(table+".csv", index=False,sep='|')
print("file Wrote now mapping columns")
COL_MAPPING_FILE = "postgresToRedshiftColMapping.csv"
mapped_list = self.pgObj.get_ColMapped(table, COL_MAPPING_FILE)
print("Got mapped list Outside : ",mapped_list)
pkCol = self.pgObj.get_Primary_Key(table)
print("Primary Key:",pkCol)
createTabelquery = self.pgObj.createTableQuery(mapped_list,table,pkCol)
print(createTabelquery)
selectedTable = dict()
selectedTable['table']=[table]
selectedTable['createTableQuery']=createTabelquery
selectedTable = json.dumps(selectedTable)
file = open("SelectedTable.json", 'w', encoding='utf-8')
file.write(selectedTable)
class TestView(generic.FormView):
template_name = 'source_database/test.html'
# template_name = 'source_database/selectTables.html'
def get_form(self, form_class=None):
kwargs = self.get_form_kwargs()
database = self.kwargs.get('database')
schema = self.kwargs.get('schema')
table = self.kwargs.get('table')
if table:
print("Inside get_form table")
return TableStructure(table=table,schema=schema,database=database, **kwargs)
if schema:
print("Inside get_form schema")
return TableForm(schema=schema,database=database, **kwargs)
if database:
print("Inside get_form database")
return SchemaForm(database=database, **kwargs)
return DBForm(**kwargs)
def form_valid(self, form):
database = form.cleaned_data.get('database')
schema = form.cleaned_data.get('schema')
table = form.cleaned_data.get('table')
# return redirect('targetCreds')
if table:
return HttpResponseRedirect(reverse('data', kwargs={'schema': schema, 'database': database, 'table': table}))
if schema:
print("Inside form_valid schema")
return HttpResponseRedirect(reverse('test', kwargs={'schema': schema, 'database': database}))
if database:
print("Inside form_valid database")
return HttpResponseRedirect(reverse('test', kwargs={'database': database}))
return HttpResponseRedirect(reverse('test'))
url.py
urlpatterns = [
path('admin/', admin.site.urls),
path('register/', user_views.register, name='register'),
path('profile/', user_views.profile, name='profile'),
path('login/', auth_views.LoginView.as_view(template_name='users/login.html'), name='login'),
path('logout/', auth_views.LogoutView.as_view(template_name='users/logout.html'), name='logout'),
path('form/', sourceform_view.resource, name='resources'),
# path('tables/', sourceform_view.select_tables, name="tables"),
path('blogs/', include('blog.urls')),
path('',auth_views.LoginView.as_view(template_name='users/login.html'), name='login'),
path('tables/', sourceform_view.TestView.as_view(), name='test'),
path('tables/<str:database>/', sourceform_view.TestView.as_view(), name='test'),
path('tables/<str:database>/<str:schema>/', sourceform_view.TestView.as_view(), name='test'),
path('tables/<str:database>/<str:schema>/<str:table>', sourceform_view.TestView.as_view(), name='data'),
path('targetSource/', targetform_view.target, name='targetCreds'),
path('targetSource/process/', targetform_view.process, name='targetProcess'),
]
template test.html
{% extends "blog/layout.html" %}
{% load crispy_forms_tags %}
{% block content %}
<form name ='xyz' method="post" onchange="xyz.submit();">
{% csrf_token %}
{{ form.as_p }}
<!-- <input type="submit" value="Submit"/> -->
</form>
{% endblock content %}
''
答案 0 :(得分：0)
首先，您对Django's FormView类有错误的理解。通常的重定向应该通过form_valid()和form_invalid()方法进行。 get_form()负责创建您的Form类的实例，仅此而已。最好的方法是在TableStructure(table=table,schema=schema,database=database, **kwargs)方法内创建form_valid()对象，然后制作HttpResponseRedirect。但您可以这样做，
class TestView(generic.FormView):
template_name = 'source_database/test.html'
form_class = YourFormClassHere # + Add your form class here
# template_name = 'source_database/selectTables.html'
def get_form(self, form_class=None):
my_form = super(TestView, self).get_form() # +
kwargs = self.get_form_kwargs()
database = self.kwargs.get('database')
schema = self.kwargs.get('schema')
table = self.kwargs.get('table')
if table:
print("Inside get_form table")
table_structure = TableStructure(table=table,schema=schema,database=database, **kwargs)
self.form_valid(my_form) # +
if schema:
print("Inside get_form schema")
return TableForm(schema=schema,database=database, **kwargs)
if database:
print("Inside get_form database")
return SchemaForm(database=database, **kwargs)
return DBForm(**kwargs)
def form_valid(self, form):
database = form.cleaned_data.get('database')
schema = form.cleaned_data.get('schema')
table = form.cleaned_data.get('table')
# return redirect('targetCreds')
if table:
return HttpResponseRedirect(reverse('data', kwargs={'schema': schema, 'database': database, 'table': table}))
if schema:
print("Inside form_valid schema")
return HttpResponseRedirect(reverse('test', kwargs={'schema': schema, 'database': database}))
if database:
print("Inside form_valid database")
return HttpResponseRedirect(reverse('test', kwargs={'database': database}))
return HttpResponseRedirect(reverse('test'))
测试此代码。