How to set thymeleaf th field value from other variable

Question

I have a simple text input field where i have to set default value from one object and save its final value in other  The following code is not working    lt div th object    form   gt       lt input class  form-control             type  text             th value    client name      this line is ignored            th field    clientName    gt   lt  div gt    form is DTO object and client is Entity object from database   What is the correct way to solve this situation   By not working I mean - lets say that initial values are client name  Foo  and form clientName null   I need that input field display value is  Foo  and after form submission form clientName value to become  Foo   But the input field displays nothing and on submission form clientName value still is null   If anyone is interested  solved this issue using following structure  found the answer in another question    th attr  value     client name

User · Answer

So what you need to do is replace th field with th name and add th value  th value will have the value of the variable you re passing across    lt div class  col-auto  gt           lt input type  text  th value    client name   th name  clientName           class  form control  gt   lt  div gt

User · Answer

If you don t have to come back on the page with keeping form s value  you can do that      lt form method  post  th action         th object    form   gt       lt input class  form-control             type  text             th field    client name    gt    It s some kind of magic     it will set the value   client name it will send back the value in the form  as  name  field  So you would have to change your form field   clientName  to  name    If you matter keeping you form s input values  like a back on the page with an user input mistake  then you will have to do that     lt form method  post  th action         th object    form   gt       lt input class  form-control             type  text             th name  name             th value    form name    null      form name      client name    gt    That means     The form field name is  name  The value is taken from the form if it exists  else from the client bean  Which matches the first arrival on the page with initial value  then the forms input values if there is an error     Without having to map your client bean to your form bean   And it works because once you submitted the form  the value arn t null but     empty

User · Answer

The correct approach is to use preprocessing  For example  th field        myVar

User · Answer

You could approach this method   Instead of using th field use html id  amp  name  Set value using th value   lt input class  form-control             type  text             th value    client name   id  clientName  name  clientName    gt    Hope this will help you

User · Answer

It has 2 possible solutions   1  You can set it in the view by javascript     not recomended     lt input class  form-control         type  text         id  tbFormControll         th field    clientName    gt    lt script type  text javascript  gt          document getElementById  tbFormControll   value    default    lt  script gt    2  Or the better solution is to set the value in the model  that you attach to the view in GET operation by a controller  You can also change the value in the controller  just make a Java object from  client name and call setClientName   public class FormControllModel               private String clientName    default       public String getClientName              return clientName            public void setClientName  String value            clientName   value                    I hope it helps

[html] How to set thymeleaf th:field value from other variable

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