getFilter method
Implementation
String getFilter() {
if (_operators.isNotEmpty) {
var result = '';
_operators.forEach((element) {
result += element.getSqlSyntax();
});
if (result.isNotEmpty) {
if (result.substring(1, 5) == ' and ') {
return result.replaceFirst(' and ', '');
} else {
return result;
}
} else {
return '';
}
} else {
return '';
}
}