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How to make a filter of the previous field

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baileigh last edited by
There is a form in which the filter should be made relative to the previous field, if there is one in the previous field, there are some options in the next field, and so on.
```
модель формы
car_name = models.ForeignKey(Cars)
detail = models.ForeignKey(Details)
модель Details

details_cars = models.ForeignKey(Cars)
```
I mean, Car name changes detail options.
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briley last edited by

It's not about that. Django done, but JS♪ Unless you want to make a user reload the page after each choice. Car name♪
I'd do that. ♪ Django Prepared JSON type [{car_name: ['коленвал', 'колесо'], car_name: ['колесо']}, in the vein or after the pages are downloaded, the page shall be tightened JSON You're still operating. JS♪ Triggers hanging on event Selters are monitored and updated.
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Software Programming • python django scabs • • Demir

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We need to check in. We need to stop the cycle. Because you can't use a break in a hat.class MyClassCreateView(LoginRequiredMixin, CustomSuccessMessageMixin, CreateView): model = MyClass template_name = 'mypage.html' form_class = MyClassForm success_url = reverse_lazy('mypage') success_msg = 'сохранён' def get_context_data(self, **kwargs): kwargs['list_mylist'] = MyClass.objects.all() list_mylist = kwargs['list_mylist'] for i in list_mylist: if i.author == self.request.user: print('my_button') kwargs['my_button'] = True break return super().get_context_data(**kwargs) My_button test. {% if my_button %} {% for i in list_mylist %} {% if request.user == i.author %} <a class="btn btn-primary" href="#" role="button"> кнопка первая </a> {% endif %} {% endfor %} {% else %} <button type="button" class="btn btn-primary mr-4" data-toggle="modal" data-target="#class"> кнопка вторая </button><br> {% endif %}
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Sum of field values filtered from each line
Software Programming • python pandas numpy filter • • kalyn

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If I understood the question correctly, it could help. groupby Method.In particular df.groupby(by=['date', 'shipto', 'plu'])['del_qty'].sum()
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How to make a custom action filter?
Software Programming • c sharp asp.net mvc asp.net mvc asp.net mvc 5 • • Rossere

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You can set Result of the answer and then redirect to thepublic async override void OnActionExecuting(ActionExecutingContext filterContext) { // tu lógica y si falla establecer lo siguiente filterContext.Result = new HttpStatusCodeResult(404); } And configuring your custom errors in the web.config We'.<customerrors mode="On"> <error statuscode="404" redirect="~/Testing/NoPageFound"> </error> </customerrors>
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error str-int and does not allow to convert
Software Programming • python • • kalena

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Miscellaneous remarks regarding your code and your question:The data you have in the dictionary are string lists. Using quotes as in '0.18'The data is type str. So the data you have on lista[1][0] It's a chain, because already in origin (within the initial dictionary) it was, not because it has become a chain by passing it to a list, as you mention in a comment.If you do not want the data, already in origin, be chains but floats, do not put them in quotation marks in the dictionary.If the input data are chains and you can't avoid it, you can convert them to float when you need to operate with them through float(dato). What you've tried int(dato) it doesn't work because the string contains the character "." which cannot appear in an integer (although in a float). You can also convert them to float while you're keeping them on the list filtrada2 (at the end of this answer I show how).On the other hand, your loop:for persona in range (1,numpersonas+1): filtrada2= [(f,(pes1, pes2, pes3, pes4, pes5)) for (f,(pes1, pes2, pes3, pes4, pes5)) in diccionario.items() if f==persona] Apparently what you want to do is convert the dictionary into a list. I suppose you do so that within it the data ordered by the key appear, that is, first the list whose key in the dictionary is 1Then the one that uses the key 2etc. I understand you do this because the dictionaries don't guarantee the order.However the way you do it is quite inefficient, and incorrect:You make a loop in which persona it's taking values 1, 2.. I understand that they correspond to the keys of your dictionary.For each one, you collect the entire dictionary by means of a list comprehension to find which item has a key that matches persona Why? Isn't it much easier to do diccionario[persona] to get it, instead of going through the entire dictionary to stay only with the case in which f==persona?Each loop iteration saves the result of the list comprehension in the same variable (filtrada2). Each new iteration therefore causes the result of the previous iteration to be lost. Upon leaving the loop you will only have the list corresponding to the last person.I suspect you don't want to stay with the last person alone, since later you try to iterate filtrada2 like I have several rows. If what you want is to accumulate in a list the results of the previous loop, then you can do the following:filtrada2 = [] for persona in range(1, numpersonas+1): filtrada2.append((persona, diccionario[persona])) Outcome:>>> filtrada2 [(1, ['0.18', '0.26', '0.41', '0.11', '0.05']), (2, ['0.34', '0.07', '0.39', '0.16', '0.03'])] But if the reason for doing this was that you just wanted to change the dictionary by a list, so it gets sorted by the number of people, you could change the entire loop above by a line:filtrada2 = sorted(diccionario.items()) since diccionario.items() gives you a list of tuplas in which each tupla has two elements, the first the code of the dictionary (number of person) and the second the value (list of strings), and then sorted() He orders that list for the first element of each tupla, which is the number of person.Since later you're going to process that list, you don't want the data to be strings, you need them to be float. As I said at first if you can change the input dictionary to remove the quotes, you would have it. If not, then you have two options:Convert it to float when you go to operate with the data (i.e. float(fila[1][i])For example.Convert data to float while creating the list filtrada2.The second option can also be made in many ways. One of them, perhaps the most readable:filtrada2 = [] for persona in range(1, numpersonas+1): filtrada2.append((persona, [float(dato) for dato in diccionario[persona]]) ) result:>>> filtrada2 [(1, [0.18, 0.26, 0.41, 0.11, 0.05]), (2, [0.34, 0.07, 0.39, 0.16, 0.03])]
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Complete fields from a field with mask
Software Programming • javascript php • • simrah

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1 - To keep the mask in the field and search, remove the special characters within the function:function ret($cep, $conn){ $a_cep = str_replace(".", "", $cep); $b_cep = str_replace("-", "", $a_cep); $result = "SELECT * FROM cadcep WHERE cep = '$b_cep' LIMIT 1"; 2 - To set the mask, order it to be executed again after the values have been filled, and replace the '0' (indica apenas o padrão da máscara) por'9'(indicates what the pattern is numerical) : $.getJSON('function_func.php',{ cep: $( this ).val() },function( json ){ $tipo_logr.val ( json.tipo_logr ); $nome_logr.val ( json.nome_logr ); $bairro.val ( json.bairro ); $cidade.val ( json.cidade ); $estado.val ( json.estado ); $('#cep').mask('99999-999'); $('#fone').mask('9999-9999'); $('#fax').mask('9999-9999'); $('#data_nascimento').mask('99/99/9999'); }); OBS: Personally I find the plugin https://github.com/RobinHerbots/Inputmask better to create masks, it keeps formatting independent of the time of filling.
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Importance of extension of module .py to python and its contents
Software Programming • python modules • • kalena

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.pyi files are stubs, their appointment and format are described in https://www.python.org/dev/peps/pep-0484/#stub-files ♪ These files are in no way used by the interpreter, their purpose is to provide information on the type of code. For example, you have a side module without a typology that isn't yours, editing it, you can't, and you'd like to describe the types:# fizz.py def greet(who): return f'Hello {who}' The exit is through the stack: create a file fizz.pyiwhich contains a typical signature greet without implementation:# fizz.pyi def greet(who: str) -> str: ... Now the tilts of the static type mypy or Pycharm code maintenance knows where to find the typography for the function greet♪Do I understand correctly that such modules are analogous to the interface in (Java,C#) languages?No, there's no Python interface in Java/C#. If the interfaces in Java/C# are part of the programme and have a direct impact on its compilation (example: the classification of the class implementing the interface is separated by the signature of the interface)interface Fizz { public void buzz(); } class FizzImpl implements Fizz { public int buzz() { return 42; } } and the code is not compromised. Python does not have any impact on the work of the programme, as the interpreter does not know or sees them - they may not be present, contain an incorrect code or abracadabre at all; the type verification of the code editor will break down, but the programme itself will work further than ever.
How to make a filter before performing action?
Software Programming • asp. net mvc language 5 • • morde

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You can use Action Filters to do this. An Action Filter is an attribute that you place on top of each action (or in the controller, to apply to all actions) indicating to the framework that, before running the action, it should run your filter. Test the code below:Home controller code:using MvcApplication1.ActionFilters; using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; namespace WebApplication1.Controllers { public class HomeController : Controller { [MeuFilter] public ActionResult Index() { return View(); } public ActionResult About() { ViewBag.Message = "Your application description page."; return View(); } public ActionResult Contact() { ViewBag.Message = "Your contact page."; return View(); } } } Filter Code:using System; using System.Diagnostics; using System.Web; using System.Web.Mvc; using System.Web.Routing; namespace MvcApplication1.ActionFilters { public class MeuFilter : ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) { HttpSessionStateBase session = filterContext.HttpContext.Session; Controller controller = filterContext.Controller as Controller; if (controller != null) { if (session["Login"] == null) { controller.HttpContext.Response.Redirect("/Home/About"); } } } public override void OnActionExecuted(ActionExecutedContext filterContext) { // Implementar } public override void OnResultExecuting(ResultExecutingContext filterContext) { // Implementar } public override void OnResultExecuted(ResultExecutedContext filterContext) { //Implementar } } } Before running the Index action, the "MyFilter" will run, and in it I am checking a login session, if there is no, redirects to another action. To create an Action Filter you need to inherit the ActionFilterAttribute class and implement the IActionFilter interface. For more details I suggest reading https://ozsenegal.wordpress.com/2011/01/21/asp-net-mvc-entendendo-action-filters/
Json file reading in Python (initiative)
Software Programming • python python 3.x json list dic languagetionary • • inna

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You can convert to list of dictionaries for one list dictionary filtering only the fields that interest you, see: import json campos = ['nomeArq','percDif'] with open('teste.json') as f: entrada = json.load(f) saida = {campo:[] for campo in campos} for elemento in entrada: for campo in campos: saida[campo].append(elemento[campo]) print(saida) Output:{'nomeArq': ['arquivoA', 'arquivoB', 'arquivoC'], 'percDif': [66.8, 70.0, -15.0]} See working on https://repl.it/repls/DelectableAdmiredFiber Summarizing in a dictionary comprehension combined with a list comprehension:import json campos = ['nomeArq','percDif'] with open('teste.json') as f: entrada = json.load(f) saida = {c: [e[c] for e in entrada] for c in campos} print(saida) Output:{'nomeArq': ['arquivoA', 'arquivoB', 'arquivoC'], 'percDif': [66.8, 70.0, -15.0]} See working on https://repl.it/repls/LightcoralSimultaneousProfiles Line chart generation with the pyplot:import matplotlib.pyplot as plt import json campos = ['qtdAnt', 'qtdAtu', 'percDif'] with open('teste.json') as f: entrada = json.load(f) saida = {c: [e[c] for e in entrada] for c in campos} for campo in campos: plt.plot(saida[campo], label=campo) plt.legend() plt.show() Output:
I'm working with qt designer and I want to make a calculator of the drab. I don't know how to reproduce the answer?
Software Programming • python pyqt5 • • Analeea

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this is libclass Fraction(object):def __init__(self, top: int, bottom: int): self.__top = top self.__bottom = bottom def str(self) -> str: return f'{self.__top} / {self.__bottom}' def add(self, other): e1 = self.__top * other.__bottom e2 = self.__bottom * other.__top e = e1 + e2 f = self.__bottom * other.__bottom return Fraction(e, f) def sub(self, other): e1 = self.__top * other.__bottom e2 = self.__bottom * other.__top e = e1 - e2 f = self.__bottom * other.__bottom return Fraction(e, f) def mul(self, other): e1 = self.__top * other.__top e2 = self.__bottom * other.__bottom return Fraction(e1, e2) def truediv(self, other): e1 = self.__top * other.__bottom e2 = self.__bottom * other.__top return Fraction(e1, e2) def reduce(self): if self.__top > self.__bottom: k = self.__top else: k = self.__bottom while k != 1: if self.__top % k == 0 and self.__bottom % k == 0: return f'{self.__top // k} / {self.__bottom // k}' else: k -= 1 def get_top(self): return self.__top def get_bottom(self): return self.__bottom this is guifrom PyQt5 import QtWidgets, uicfrom PyQt5. QtWidgets import QMessageBoxfrom lib import Fractionclass MainWindow(QtWidgets.QMainWindow):def init(self): super().init() self.__win = uic.loadUi('MainWindow.ui') def show(self): self.set_slots() self.__win.show() def set_slots(self): self.__win.pushButton.clicked.connect(self.slot1) def slot1(self): a = int(self.__win.lineEdit.text()) b = int(self.__win.lineEdit_2.text()) c = int(self.__win.lineEdit_3.text()) d = int(self.__win.lineEdit_4.text()) s = self.__win.lineEdit_8.text() res1 = Fraction(a, b) res2 = Fraction(c, d) if s == '+': res = res1 + res2 if res.get_top() > res.get_bottom(): dom = res.get_top() // res.get_bottom() top = res.get_top() % res.get_bottom() print(self.__win.lineEdit_5.setText(f'{top}'), self.__win.lineEdit_6.setText(f'{res.get_bottom()}')) self.__win.lineEdit_7.setText(f'{dom}') else: print(self.__win.lineEdit_5.setText(f'{res.get_top()}'), self.__win.lineEdit_6.setText(f'{res.get_bottom()}')) self.__win.lineEdit_7.setText('0') if s == '-': res = res1 - res2 if res.get_top() > res.get_bottom(): dom = res.get_top() // res.get_bottom() top = res.get_top() % res.get_bottom() print(self.__win.lineEdit_5.setText(f'{top}'), self.__win.lineEdit_6.setText(f'{res.get_bottom()}')) self.__win.lineEdit_7.setText(f'{dom}') else: print(self.__win.lineEdit_5.setText(f'{res.get_top()}'), self.__win.lineEdit_6.setText(f'{res.get_bottom()}')) self.__win.lineEdit_7.setText('0') if s == '/': res = res1 / res2 if res.get_top() > res.get_bottom(): dom = res.get_top() // res.get_bottom() top = res.get_top() % res.get_bottom() print(self.__win.lineEdit_5.setText(f'{top}'), self.__win.lineEdit_6.setText(f'{res.get_bottom()}')) self.__win.lineEdit_7.setText(f'{dom}') else: print(self.__win.lineEdit_5.setText(f'{res.get_top()}'), self.__win.lineEdit_6.setText(f'{res.get_bottom()}')) self.__win.lineEdit_7.setText('0') if s == '*': res = res1 * res2 if res.get_top() > res.get_bottom(): dom = res.get_top() // res.get_bottom() top = res.get_top() % res.get_bottom() print(self.__win.lineEdit_5.setText(f'{top}'), self.__win.lineEdit_6.setText(f'{res.get_bottom()}')) self.__win.lineEdit_7.setText(f'{dom}') else: print(self.__win.lineEdit_5.setText(f'{res.get_top()}'), self.__win.lineEdit_6.setText(f'{res.get_bottom()}')) self.__win.lineEdit_7.setText('0') # QMessageBox.information(self, 'Заголовок', str()) # QMessageBox.question(self, 'Заголовок', 'Вопрос?') # QMessageBox.warning(self, 'Заголовок', 'Предупреждение') # QMessageBox.critical(self, 'Заголовок', 'Ошибка')
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Tuplo indices on a list - python
Software Programming • python list tuple • • tahishae

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I do not understand right what you want, so please rephrase your question. But if you want to access the third tuple index on your tuple list, you can do it directly like this:for i in range(len(list1)): x = list1[i][3] print(x) Or, more simply:for t in list1: x = t[3] print(x) The way you did is wrong because in your form you are returning an entire tuple, and not an index to index in list1.
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How to check before adding SQL
Software Programming • python mysql sql • • rielyn

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insert ignore into ttt ... And there's no need for checks, it's going to cause a mistake of duplication, and the record will certainly be one.
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How do I make a validation of empty fields in android studio?
Software Programming • java android studio • • Pearlaqua

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The problem is you're getting the value String of the EditText which is incorrect: if (campoId.toString().isEmpty()||campoNomCompleto.toString().isEmpty()||campoCorreo.toString().isEmpty()||campoContrasenia.toString().isEmpty() ||campoContraseniaRep.toString().isEmpty()) { You must get the text in the EditText using getText() and this way you can validate correctly using isEmpty(): if (campoId.getText().toString().isEmpty()||campoNomCompleto.getText().toString().isEmpty()||campoCorreo.getText().toString().isEmpty()||campoContrasenia.getText().toString().isEmpty() ||campoContraseniaRep.getText().toString().isEmpty()) {
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As I can delimit a table by number of rows in (reportlab + django)
Software Programming • python python 3.x django pdf reportlab • • derk

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I expect this to serve you, I had the same problem in a report system and I did not find how to do it, so I implemented it, it is simply to page the information that will be added to the table, taking into account the height that occupies each cell of the table, the logic is as follows: First calculate the number of pixels that exist from the beginning of the page(in this case, the start is the end of the page, as the same page Look at the code here:def tabla(self, pdf, partes, y): width, height = A4 headers = ('Unidad', 'Fecha', 'Produccion', 'Real', 'Plan', 'Cantidad', 'TOTAL') items = [(item.unidad, item.fecha, item.produccion, item.real, item.plan, item.cant, item.total) for item in partes] table = Table([headers] + items, colWidths=80) table.setStyle(TableStyle( [ ('INNERGRID', (0, 0), (-1, -1), 0.25, colors.black), ('BOX', (0, 0), (-1, -1), 0.25, colors.black), ('ALING', (0, 0), (3, 0), 'CENTER'), ('GRID', (0, 0), (6, -1), 1, colors.black), ('BACKGROUND', (0, 0), (-1, 0), colors.lightslategray), ('FONTSIZE', (0, 0), (-1, -1), 10), ] )) table.wrapOn(pdf, width, height) table.drawOn(pdf, 20, y) pdf.showPage() def get(self, request): response = HttpResponse(content_type="application/pdf") response['Content-Disposition'] = 'attachment; filename = Reporte' buff = BytesIO() pdf = canvas.Canvas(buff, pagesize=portrait(A4)) partes = Parte_Diario_Unidad.objects.filter(**filtros).order_by('unidad', 'fecha') #################################################################################### esta es la parte de la paginacion max_len = 25 # se define la cantidad por pagina(previamente calculado) heigth_data = len(partes) # se obtiene la longitud de la lista de datos a mostrar if heigth_data <= max_len: # si la cantidad de elementos de la lista es menor que la cantidad definida por paginas, en este caso 25 se pasa la lista tal cual partes = list(partes) self.tabla(pdf, partes, y=600 - (len(partes) * 18)) elif heigth_data > max_len: partes = list(partes)[::-1] # esto es solo para invertir la lista pages_needed = math.ceil(float(heigth_data / max_len)) #se obtiene la cantidad de paginas necesarias a partir de la cantidad de datos en la lista iterator = max_len # se guarda el valor en un iterador for page in range(0, int(pages_needed)): # esta parte se explica por si sola record = [] if max_len < len(partes): iterator = max_len else: iterator = len(partes) for i in range(0, iterator): record.append(partes.pop()) self.set_page_number(pdf, number_page=(page + 1)) # una funcion que hice para a;adir el numero de pagina self.tabla(pdf, record, y=600 - (len(record) * 18.3)) # aqui y es la coordenada y donde empezara a dibujar la tabla pdf.save() pdf = buff.getvalue() buff.close() response.write(pdf) return response
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function python with django
Software Programming • javascript python django • • courtlanda

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Good, the operation you describe seems normal, when you run your development server with the command python manage.py runserver You're just running the server, and you're not gonna see the prints in that window. You have to find another way to validate these things in django.As you comment, the html is shown, and also to execute the javascript, so the function will be running it.Take a look at the loggin module https://docs.djangoproject.com/en/2.0/topics/logging/
How do you only make a field for reading?
Software Programming • javascript php readonly • • Alberto

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Give it to Input. contenteditable="false" Element will only become RO

How to make a filter of the previous field

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