Question 84575 in Docker Question posted in
The official documentation can be found here.

Submitted datetime is converted to "0001-01-01T00:00:00" – Docker

In my Razor Pages .NET Core 3.1 application I have the following simple form

<form method="post" id="formReport">
  <div class="form-group">
    <label asp-for="Parameters.From" class="control-label"></label>
    <input id="txtFrom" asp-for="Parameters.From" type="text" class="form-control" style="width:90%;" />
  </div>
  <button type="submit" class="btn btn-primary btn-sm" title="Show report">
    <i class="far fa-eye"></i> Show Report
  </button>
</form>

txtForm is a date input field implemented using DateTimePicker jQuery plugin (https://xdsoft.net/jqplugins/datetimepicker/).

var from = $('#txtFrom').datetimepicker({
            format: 'd/m/Y H:i',
            formatDate: 'Y/m/d',
            formatTime: 'H:i',
            defaultTime: '06:00',
            mask: '39/19/9999 29:59',
            monthChangeSpinner: true,
            onChangeDateTime: function (dp, $input) {
                console.log($input.val());
            }
       });

The output from console.log above when I enter as date 13/02/2022 06:00 is the same: 13/02/2022 06:00. So, I guess, this is the value submitted via POST. But on server-side I get "0001-01-01T00:00:00".

The code works fine when run in Debug mode from Visual Studio, or when I deploy it to a local web server. But when the app is deployed to production site using Docker the form submission doesn’t work. Submitted value is converted to "0001-01-01T00:00:00".

This is the Dockerfile I am using:

FROM mcr.microsoft.com/dotnet/aspnet:3.1-bionic-arm64v8 AS base
WORKDIR /app
EXPOSE 80

FROM mcr.microsoft.com/dotnet/sdk:3.1-bionic-arm64v8 AS build
WORKDIR /src
COPY ["myApp.Web/myApp.Web.csproj", "myApp.Web/"]
RUN dotnet restore "myApp.Web/myApp.Web.csproj"
COPY . .
WORKDIR "/src/myApp.Web"
RUN dotnet build "myApp.Web.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "myApp.Web.csproj" -c Release -o /app/publish

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .

# Create a folder for saving images; this folder exists in container filesystem
# and has to be mounted to folder of the host filesystem inside docker-compose
RUN mkdir -p /app/images

ENTRYPOINT ["dotnet", "myApp.Web.dll"]

For some reason when date is submitted it is not properly converted to a DateTime value by the model binder. Any ideas what I could do to solve the issue?

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    Comments from @Heretic Monkey helped me find a simple solution to my problem. I converted my form view model class from:

    public class ReportFormViewModel
{
    public DateTime From { get; set; }
    public DateTime To { get; set; }       
}

    to:

    public class ReportFormViewModel
{
    public string From { get; set; }
    public string To { get; set; }

    public DateTime DateFrom
    {
        get
        {
            return DateTime.ParseExact(From, "dd/MM/yyyy HH:mm", 
                                         CultureInfo.InvariantCulture);
        }
    }

    public DateTime DateTo
    {
        get
        {
            return DateTime.ParseExact(To, "dd/MM/yyyy HH:mm",
                                         CultureInfo.InvariantCulture);
        }
    }

}

    So the value submitted is not converted to DateTime by the model binder. Instead I explicitly parse the string received using the client side date format.


  2. 0

    Just rewrite this model like: [Make nullable by using ? ]

    public class ReportFormViewModel
{
    public DateTime? From { get; set; }
    public DateTime? To { get; set; }       
}

    That’s it.

    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search