I have a custom rest control written in Java. Everything works fine for string fields, but not for multi-value string fields. My code returns
"[Value1, Value2, Value3...]". Note there are no commas around the values. On the web page the output looks like this:
If I can get commas around the values, the front-end framework can easily parse it.
I have tried to parse the value from the field and to get it formatted correctly, but cannot seem to get it right.
The first set of code works for a string. The second is an attempt to work for a multi-value field.
Any help would be greatly appreciated.
writer.startProperty("chgTitle");
writer.outStringLiteral(String.valueOf(columnValues.get(0)));
writer.endProperty();
writer.startProperty("plpAffected");
Object tmpObj = columnValues.get(5);
if (tmpObj instanceof Vector) {
String[] copyArr = new String[((Vector) tmpObj).size()];
((Vector) tmpObj).copyInto(copyArr);
writer.outStringLiteral(String.valueOf(copyArr));
} else {
}
writer.endProperty();
I would recommend a slightly different approach. I like to force my JSON structures to use an array anywhere a multiple value situation is possible. It also looks like you're using Philippe Riand's specialized JSON writer, so I'll assume that.
Here's about how I would attack it:
writer.startProperty("chgTitle");
writer.outStringLiteral(String.valueOf(columnValues.get(0)));
writer.endProperty();
writer.startProperty("plpAffected");
Vector<?> tmpVec = Util.getValueAsVector(columnValues.get(5));
writer.startArray();
for ( Object ob : tmpVec ) {
writer.startArrayItem();
// assuming String contents
writer.outStringLiteral(String.valueOf(ob));
writer.endArrayItem();
}
writer.endArray();
writer.endProperty();
To wrap the returning columnValues, I'm using a Java equivalent of my SSJS getValueAsVector helper function. It checks for Vector or ArrayList, which I happen to use almost exclusively; if it's not, it shoves it into a new Vector. Here's what that method looks like,
public static Vector<?> getValueAsVector(Object obj) {
if(obj instanceof java.util.Vector){
return (Vector<?>) obj;
}else if( obj instanceof ArrayList ) {
List<?> o = (List<?>) obj;
Vector<Object> tmpVec = new Vector<Object>();
for(int i=0;i<o.size();i++){
tmpVec.add(o.get(i));
}
return tmpVec;
}else {
Vector<Object> tmpVec = new Vector<Object>();
tmpVec.add(obj);
return tmpVec;
}
}
Related
I am using a LIKE query to show results from the Posts table where the category field matches one of the array elements in the Users table's skills field. But it is not giving me any results.
Controller
class TaskerController extends Controller
{
public function index()
{
return view('index');
}
public function tasks()
{
$skills = Auth::user()->skills;
$posts = Post::where('category', 'LIKE', '%'.$skills.'%');
return view('task')->with('posts', $posts);
}
}
You can not concatenate array like a string.
Since your skills is an array use whereIn method
public function tasks(){
$skills = Auth::user()->skills;
$skills = explode (",", $skills); // since you got comma separated skills you need to convert to array
//$skills =['skill1', 'skill2', 'skill3'];
$posts = Post::whereIn('category', $skills );
return view('task')->with('posts', $posts);
}
In python, I often use strings as templates, e.g.
templateUrl = '{host}/api/v3/{container}/{resourceid}'
params = {'host': 'www.api.com', 'container': 'books', 'resourceid': 10}
api.get(templateUrl.format(**params))
This allows for easy base class setup and the like. How can I do the same in dart?
I'm assuming I will need to create a utility function to parse the template and substitute manually but really hoping there is something ready to use.
Perhaps a TemplateString class with a format method that takes a Map of name/value pairs to substitute into the string.
Note: the objective is to have a generic "format" or "interpolation" function that doesn't need to know in advance what tags or names will exist in the template.
Further clarification: the templates themselves are not resolved when they are set up. Specifically, the template is defined in one place in the code and then used in many other places.
Dart does not have a generic template string functionality that would allow you to insert values into your template at runtime.
Dart only allows you to interpolate strings with variables using the $ syntax in strings, e.g. var string = '$domain/api/v3/${actions.get}'. You would need to have all the variables defined in your code beforehand.
However, you can easily create your own implementation.
Implementation
You pretty much explained how to do it in your question yourself: you pass a map and use it to have generic access to the parameters using the [] operator.
To convert the template string into something that is easy to access, I would simply create another List containing fixed components, like /api/v3/ and another Map that holds generic components with their name and their position in the template string.
class TemplateString {
final List<String> fixedComponents;
final Map<int, String> genericComponents;
int totalComponents;
TemplateString(String template)
: fixedComponents = <String>[],
genericComponents = <int, String>{},
totalComponents = 0 {
final List<String> components = template.split('{');
for (String component in components) {
if (component == '') continue; // If the template starts with "{", skip the first element.
final split = component.split('}');
if (split.length != 1) {
// The condition allows for template strings without parameters.
genericComponents[totalComponents] = split.first;
totalComponents++;
}
if (split.last != '') {
fixedComponents.add(split.last);
totalComponents++;
}
}
}
String format(Map<String, dynamic> params) {
String result = '';
int fixedComponent = 0;
for (int i = 0; i < totalComponents; i++) {
if (genericComponents.containsKey(i)) {
result += '${params[genericComponents[i]]}';
continue;
}
result += fixedComponents[fixedComponent++];
}
return result;
}
}
Here would be an example usage, I hope that the result is what you expected:
main() {
final templateUrl = TemplateString('{host}/api/v3/{container}/{resourceid}');
final params = <String, dynamic>{'host': 'www.api.com', 'container': 'books', 'resourceid': 10};
print(templateUrl.format(params)); // www.api.com/api/v3/books/10
}
Here it is as a Gist.
Here is my solution:
extension StringFormating on String {
String format(List<String> values) {
int index = 0;
return replaceAllMapped(new RegExp(r'{.*?}'), (_) {
final value = values[index];
index++;
return value;
});
}
String formatWithMap(Map<String, String> mappedValues) {
return replaceAllMapped(new RegExp(r'{(.*?)}'), (match) {
final mapped = mappedValues[match[1]];
if (mapped == null)
throw ArgumentError(
'$mappedValues does not contain the key "${match[1]}"');
return mapped;
});
}
}
This gives you a very similar functionality to what python offers:
"Test {} with {}!".format(["it", "foo"]);
"Test {a} with {b}!".formatWithMap({"a": "it", "b": "foo"})
both return "Test it with foo!"
It's even more easy in Dart. Sample code below :
String host = "www.api.com"
String container = "books"
int resourceId = 10
String templateUrl = "$host/api/v3/$container/${resourceId.toString()}"
With the map, you can do as follows :
Map<String, String> params = {'host': 'www.api.com', 'container': 'books', 'resourceid': 10}
String templateUrl = "${params['host']}/api/v3/${params['container']}/${params['resourceId']}"
Note : The above code defines Map as <String, String>. You might want <String, Dynamic> (and use .toString())
Wouldn't it be simplest to just make it a function with named arguments? You could add some input validation if you wanted to.
String templateUrl({String host = "", String container = "", int resourceid = 0 }) {
return "$host/api/v3/$container/$resourceId";
}
void main() {
api.get(templateUrl(host:"www.api.com", container:"books", resourceid:10));
}
var persons: List<Person> = readPersonsFile("persons.txt");
ListSort.sort(persons, function(personA, personB): Int
{
return Person.compare(personA.first(), personB.first());
});
I'm just trying to sort this list. It's giving me this error:
Constraint check failure for sort.T
List<Person> should be { prev : List<Person>, next : List<Person> }
List<Person> has no field next
Which is wierd to me, because it sounds like it's wanting me to pass an implicit object with two different lists, which if that's really the way... that's not very insulated if that's true.
ListSort is only supposed to work on singly or doubly linked lists; the List class is neither of these (although it does share some APIs with them, but with different time and space costs).
In your case, you can probably change readPersonsFile to return either an Array or a haxe.ds.GenericStack, and use either persons.sort(cmp) or ListSort.sortSingleLinked(persons.head, cmp).
Also, if necessary, you can easily convert any iterable – that is, any object that has an iterator:Void->Iterator<T> method – into an array with Lambda.array(iterable).
The documentation is lacking the necessary constraints on the T parameters. This is a bug in the documentation generator that I'll try to report soon.
From what I can see haxe.ds.ListSort is supposed to work on linked-list like structures, not Haxe Lists. If all you want to do is sort a list might be easier to simply use an Array. If your goal is to use this particular type of sorting and want to avoid using arrays (because of memory limits for example) you just need to provide it with a structure like:
typedef PersonListItem = {
var prev:PersonListItem;
var next:PersonListItem;
var person:Person;
}
(like the ListItem used internally by Haxe List actually)
But I assume you want to just sort "a list". So if that's what you are after it may look like this:
class Test {
static function main() {
var persons:Array<Person> = readPersonsFile("persons.txt");
trace(persons.join(","));
persons.sort(Person.compare);
trace(persons.join(","));
trace(persons[0]);
}
static function readPersonsFile(name:String):Array<Person> {
var result = new Array<Person>();
result.push(new Person(8));
result.push(new Person(1));
result.push(new Person(2));
result.push(new Person(6));
result.push(new Person(0));
result.push(new Person(9));
result.push(new Person(3));
result.push(new Person(7));
result.push(new Person(4));
result.push(new Person(5));
return result;
}
}
class Person {
var id:Int;
public function new(id) {
this.id = id;
}
public static function compare(a:Person, b:Person):Int {
return a.id - b.id;
}
public function toString():String {
return 'Person($id)';
}
}
I'm trying to use setup data from one table to allow me to format fields on the fly / dynamically. I know I can change field names and visibility based on the PXUIFieldAttribute class, but changing the precision or string length is a bit trickier, obviously. From the research I've done, I've come up with the following example code that seems like it should work - but I get the error:
"Unable to cast object of type 'PX.Data.PXUIFieldAttribute' to type 'PX.Data.PXDBDecimalAttribute'.
I don't see why this is occurring...
protected virtual void xTACOpenSourceDetail_RowSelected(PXCache sender, PXRowSelectedEventArgs e)
{
var osd = (PXCache)sender;
foreach (PXDBDecimalAttribute attribute in this.Caches<xTACOpenSourceDetail>().GetAttributes("Number1"))
{
PXDBDecimalAttribute someAttribute = attribute as PXDBDecimalAttribute;
if (someAttribute != null)
{
someAttribute.DBProperties._precision = 4;
}
}
}
I just tried the below code in sales order screen and it seems working!
var props = typeof(SOOrder).GetProperties().Where(prop => Attribute.IsDefined(prop, typeof(PXDecimalAttribute)));
foreach (System.Reflection.PropertyInfo item in props)
{
PXDecimalAttribute.SetPrecision(this.Base.Caches[typeof(SOOrder)], item.Name, 1);
}
You might need to change this to match your DAC.
I have write a custom field that extends SPFieldLookup. I set AllowMultipleValues = true;
Here is Field Control Value:
public override object Value
{
get
{
EnsureChildControls();
SPFieldLookupValueCollection vals = new SPFieldLookupValueCollection();
ICollection s = TinBaiLienQuanPicker.SelectedIds;
if (s != null && s.Count > 0)
{
foreach (var i in s)
{
ListItem z = availableItems.Find(x => (x.Value == i.ToString()));
if (z != null)
{
vals.Add(new SPFieldLookupValue(int.Parse(z.Value), z.Text));
}
}
}
return vals;
}
set
{
EnsureChildControls();
base.Value = value as SPFieldLookupValueCollection;
}
}
When control save field data, I see it return a collection which have multiple value.
But when I retrieve data again, I receive only the first value. I get value from Control Field ' ListItemFieldValue property.
Please give me a tip. Thank you very much.
Data storage logic is different in the database for lookup field with one value compared to multiple values. Check that in the field type definition xml ParentType is set to LookupMulti instead of Lookup.
You have to inherit the field control class from MultipleLookupField not from LookupField. Are you sure you are doing this?