Fluent validation: either have both fields with value or both must be empty

See also questions close to this topic

• Matching number with regex

  Need a single combined regex to match the following logic: The number should be 8 digits long, the 8th digit should be the remainder of (the first 7 digits / 7).

  for example: 86008786

  remainder = (the first 7 digit)/ 7 = 8600878 / 7 = 6

  so the 8 digit 86008786 is valid number.

  is it doable with regex?
• Validation Control are not working on live server [Google Cloud] with VS 2015 (Asp.Net with C#)

  On my local machine everything is working fine...but on live server validation control are not working. [I am using Google Cloud (Windows Server 2019)].

  I am using VS 2015 (Asp.Net Web Form with c#))

  my code is here...

   <asp:TextBox ID="txtFirstName" runat="server" placeholder="Your First Name" MaxLength="25"  ></asp:TextBox>
   <asp:RequiredFieldValidator ID="rfvFirstName" runat="server" ControlToValidate="txtFirstName" Display="Dynamic" ErrorMessage="First Name is required." SetFocusOnError="True" ValidationGroup="v" ForeColor="Red"></asp:RequiredFieldValidator>
                                 
    <asp:Button ID="btnSubmit" runat="server" Text="Submit" ValidationGroup="v"  />
  

  I read some articles related to this. According to them I added below code in my web.config file but still issue are same...

   <add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />  <!--Using 4.5 Version only-->
  
• Struts2 field validator - Validate multiple fields together

  As part of my project I have the credit card month and year as two different fields,

  <field name="expiry-month">
      <field-validator>
          ...
      </field-validator>
  </field>
  <field name="expiry-year">
      <field-validator>
          ...
      </field-validator>
  </field>
  

  Now, I want to validate the values of these two fields as together so that the credit card expiry month and year are not in past.

  How can I do that within XML?

  Thank you.
• looking for fluent validation library for python

  can any one suggest a good fluent validation library for Python. I found couple of them, but but they were not much useful

  • https://github.com/nschejtman/py-v8n/tree/master/src
  • https://github.com/bwhmather/python-validation
• how to apply fluent validation for server side

  here I used client side validation its working fine but i also need to apply server side validation

  if (_eaches > _receivedCases) {
    $("#EachesMessage_" + index).css("display", "block");
    $("#EachesMessage_" + index).text("* Shouldn't be greater than received cases");
  } else if (_eaches <= _receivedCases) {
    $("#EachesMessage_" + index).css("display", "none");
  }

  <td>
    @Html.TextBoxFor(x => x.Items[i].ReceivedNumberOfCases, new { @class = "form-control text-right", @id="Received_"+ i ,@onkeyup = "outer.onChangeReceived("+ i +")" ,onkeypress="return fnAllowNumeric()"}) @Html.ValidationMessageFor(x=>x.Items[i].ReceivedNumberOfCases,null,new{@class="text-danger",@id="recivedCasesMessage_"+i })&nbsp;
  
  </td>
  
  <td>
    @Html.TextBoxFor(x=>x.Items[i].DamagedProductsByEaches, new { @class = "form-control text-right Eaches", @id="Eaches_"+ i ,@onkeyup = "outer.onChangeEachers("+ i +")", @min="0" }) @Html.ValidationMessageFor(x=>x.Items[i].DamagedProductsByEaches,null,new{@class="text-danger",@id="EachesMessage_"+i })&nbsp;
  </td>