I tried using this configuration for converting TINYINT(1) to BOOLEAN as per this blog in Gradle plugin
https://blog.jooq.org/2019/09/27/how-to-map-mysqls-tinyint1-to-boolean-in-jooq/
database {
name = 'org.jooq.meta.mysql.MySQLDatabase'
inputSchema = 'example'
forcedTypes {
forcedType {
name = "BOOLEAN"
types = "(?i:(TINY|SMALL|MEDIUM|BIG)?INT(UNSIGNED)?\\(1\\))"
}
}
}
It doesn't seem to work. The TINYINT(1) type is still generated as Byte and not Boolean.
In my case, the TINYINT was without "(1)", so worked this way (Gradle Groovy DSL):
forcedTypes {
forcedType {
name = 'BOOLEAN'
includeTypes = '(?i:TINYINT)'
}
}
With TINYINT(1) you can use includeTypes = '(?i:TINYINT(1))', without backslash.
Related
I have a Core Data NSManagedObject entity Person with a Bool attribute that I generate as a NSNumber. (the "Use Scalar Type" checkbox is not used, so the Bool attribute becomes an NSNumber)
I am trying to observe this attribute, employed, to control the UI.
#ObservedObject var person: Person
var body: some View {
List {
Section {
HStack {
Toggle(isOn: $person.employed) { <-- 1
Text("Showing employed content..")
}
}
}
if person.employed.boolValue {
Section { } etc
I get a warning at "1" saying: Cannot convert value of type 'Binding<NSNumber?>' to expected argument type 'Binding<Bool>'
How can I make use of the employed attribute as a bool without changing it to a scalar?
Note: $person.employed.boolValue would not work it seems, and I would also have to account for the optional part.
One possible way to do it is via a custom Binding:
Toggle("Showing employed content..", isOn: Binding<Bool>(get: {
person.employed?.boolValue == true
}, set: { value in
person.employed = NSNumber(value: value)
}))
Now, if you prefer this to be a computed property instead, you could do something like this:
var isEmployed: Binding<Bool> {
Binding<Bool>(get: {
person.employed?.boolValue == true
}, set: { value in
person.employed = NSNumber(value: value)
})
}
var body: some View {
Toggle("Showing employed content..", isOn: isEmployed)
}
Also, here is a possible implementation of an extension that handles optional NSNumber backed booleans (excuse my terible naming):
extension Binding where Value == NSNumber? {
var boolBinding: Binding<Bool> {
Binding<Bool>(get: {
self.wrappedValue == true
}, set: { value in
self.wrappedValue = NSNumber(value: value)
})
}
}
which can be used like this:
Toggle("Showing employed content..", isOn: $person.employed.boolBinding)
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));
}
I would like to replace my global string constants with a nested enum for the keys I'm using to access columns in a database.
The structure is as follows:
enum DatabaseKeys {
enum User: String {
case Table = "User"
case Username = "username"
...
}
...
}
Each table in the database is an inner enum, with the name of the table being the enum's title. The first case in each enum will be the name of the table, and the following cases are the columns in its table.
To use this, it's pretty simple:
myUser[DatabaseKeys.User.Username.rawValue] = "Johnny"
But I will be using these enums a lot. Having to append .rawValue to every instance will be a pain, and it's not as readable as I'd like it to be. How can I access the String value without having to use rawValue? It'd be great if I can do this:
myUser[DatabaseKeys.User.Username] = "Johnny"
Note that I'm using Swift 2. If there's an even better way to accomplish this I'd love to hear it!
While I didn't find a way to do this using the desired syntax with enums, this is possible using structs.
struct DatabaseKeys {
struct User {
static let identifier = "User"
static let Username = "username"
}
}
To use:
myUser[DatabaseKeys.User.Username] = "Johnny"
Apple uses structs like this for storyboard and row type identifiers in the WatchKit templates.
You can use CustomStringConvertible protocol for this.
From documentation,
String(instance) will work for an instance of any type, returning its
description if the instance happens to be CustomStringConvertible.
Using CustomStringConvertible as a generic constraint, or accessing a
conforming type's description directly, is therefore discouraged.
So, if you conform to this protocol and return your rawValue through the description method, you will be able to use String(Table.User) to get the value.
enum User: String, CustomStringConvertible {
case Table = "User"
case Username = "username"
var description: String {
return self.rawValue
}
}
var myUser = [String: String]()
myUser[String(DatabaseKeys.User.Username)] = "Johnny"
print(myUser) // ["username": "Johnny"]
You can use callAsFunction (New in Swift 5.2) on your enum that conforms to String.
enum KeychainKey: String {
case userId
case email
}
func callAsFunction() -> String {
return self.rawValue
}
usage:
KeychainKey.userId()
You can do this with custom class:
enum Names: String {
case something, thing
}
class CustomData {
subscript(key: Names) -> Any? {
get {
return self.customData[key.rawValue]
}
set(newValue) {
self.customData[key.rawValue] = newValue
}
}
private var customData = [String: Any]()
}
...
let cData = CustomData()
cData[Names.thing] = 56
Edit:
I found an another solution, that working with Swift 3:
enum CustomKey: String {
case one, two, three
}
extension Dictionary where Key: ExpressibleByStringLiteral {
subscript(key: CustomKey) -> Value? {
get {
return self[key.rawValue as! Key]
}
set {
self[key.rawValue as! Key] = newValue
}
}
}
var dict: [String: Any] = [:]
dict[CustomKey.one] = 1
dict["two"] = true
dict[.three] = 3
print(dict["one"]!)
print(dict[CustomKey.two]!)
print(dict[.three]!)
If you are able to use User as dictionary key instead of String (User is Hashable by default) it would be a solution.
If not you should use yours with a nested struct and static variables/constants.
I am trying to rename a Hyper-V snapshot (checkpoint) using root\virtualization\v2. None of the standard methods like ModifySystemSettings or ModifyVirtualSystem of Msvm_VirtualSystemSnapshotService or Msvm_VirtualSystemManagementService has been helpful so far.
Powershell Rename-VMSnapshot can do the job however I am not sure it is using WMI.
Any idea?
Here is what worked for me:
//
// Rename last snapshot to desired name
//
using (ManagementBaseObject inParams = vmms.GetMethodParameters("ModifySystemSettings"))
{
ManagementObject setting = null;
ManagementObjectCollection settings = vm.GetRelated(
"Msvm_VirtualSystemSettingData",
"Msvm_MostCurrentSnapshotInBranch",
null,
null,
"Dependent",
"Antecedent",
false,
null
);
foreach (ManagementObject instance in settings)
{
// Usually only one, but loop through to the end to get latest one
if (setting != null)
{
if (string.Compare(
(string)instance["CreationTime"],
(string)setting["CreationTime"],
true) > 0
)
{
// Get latest one since there could be duplicates
setting = instance;
}
}
else
{
setting = instance;
}
}
setting["ElementName"] = snapshotName;
inParams["SystemSettings"] = setting.GetText(TextFormat.WmiDtd20);
using (ManagementBaseObject outParams = vmms.InvokeMethod("ModifySystemSettings", inParams, null))
{
// What this does is get Job managementObject and check JobState to be JobCompleted.
this.ProcessSnapshotMethodResult(outParams, "rename");
}
}
I'm working with Sharepoint 2010.
I need to know the date of creation/edition and the author/editor of items in my sharepoint's Lists, but I didn't find a solution to map these columns with Entity Framework.
I tried this kind of code :
[Microsoft.SharePoint.Linq.ColumnAttribute(Name = "tp_author", Storage = "_author", ReadOnly = true, FieldType = "User")]
public SPUser Author
{
get
{
return this._author;
}
set
{
if (!value.Equals(this._author))
{
this.OnPropertyChanging("Author", this._author);
this._author = value;
this.OnPropertyChanged("Author");
}
}
}
But with that code, Sharepoint give me this error:
Invalid transfer type Microsoft.SharePoint.SPUser
I also tried with other types for _author, but it doesn't change anything.
Is there a way to make this mapping?
SPMetal generates the following code for a user field
[Microsoft.SharePoint.Linq.ColumnAttribute(Name="AssignedTo", Storage="_assignedToId", FieldType="User", IsLookupId=true)]
public System.Nullable<int> AssignedToId {
get {
return this._assignedToId;
}
set {
if ((value != this._assignedToId)) {
this.OnPropertyChanging("AssignedToId", this._assignedToId);
this._assignedToId = value;
this.OnPropertyChanged("AssignedToId");
}
}
}
[Microsoft.SharePoint.Linq.ColumnAttribute(Name="AssignedTo", Storage="_assignedTo", ReadOnly=true, FieldType="User", IsLookupValue=true)]
public string AssignedTo {
get {
return this._assignedTo;
}
set {
if ((value != this._assignedTo)) {
this.OnPropertyChanging("AssignedTo", this._assignedTo);
this._assignedTo = value;
this.OnPropertyChanged("AssignedTo");
}
}
}