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How to Remove Error Message in TextFormField in Flutter

How can I remove the error message in TextFormField created by validator? I just want the red border because I don't have the space to show the error.

bool error = false;
 TextFormField ( 
      hintText:error?'please input productName':'',
      hintStyle:TextStyle(color: Colors.red), 
      validator:(v){  
       v.trim().length>0?error=false:error=true; return null; 
      }
 )
Solution

  • You can return an empty string which will still mark the borders red if not valid

     validator: (String value) {
      if (value.isEmpty) {
          return '';
     }
},

    What I did to fix that was wrap the TextField with SizedBox and give a fixed height then want expand with error message

     SizedBox(
      height: SOME_FIXED_HEIGHT_INCLUDING_ERROR_MESSAGE'S_HEIGHT,
      child: TextField()