I am getting
org.codehaus.jackson.map.JsonMappingException: Conflicting getter definitions for property "node": org.apache.commons.jxpath.ri.model.NodePointer#isNode(0 params) vs org.apache.commons.jxpath.ri.model.NodePointer#getNode(0 params) (through reference chain: org.apache.commons.jxpath.ri.JXPathContextReferenceImpl["namespaceResolver"]->org.apache.commons.jxpath.ri.NamespaceResolver["namespaceContextPointer"])
I tried to use the Mixin solutions provided on stackoverflow but for my case, I am getting confused as to how to setup Mixin for NodePointer, which is a jxpath class and not my own.
Please help.
You can also disable detection of "is-getters" altogether through ObjectMapper, using setVisibility() (check javadoc for arguments, usage).
Related
I added dependencies to my profile class:
public class MyModelMappingProfile : Profile
{
public MyModelMappingProfile(
IDependency1 dependencyOne, IDependencyTwo dependencyTwo)
When I start the service it complains System.MissingMethodException: No parameterless constructor defined for type 'MyModelMappingProfile'.
Found this solution, which solves the problem, but is very manual. Is there something more generic? Haven't found an answer in the docs
https://jimmybogard.com/automapper-usage-guidelines/
X DO NOT inject dependencies into profiles
Profiles are static configuration, and injecting dependencies into them can cause unknown behavior at runtime. If you need to use a dependency, resolve it as part of your mapping operation. You can also have your extension classes (resolvers, type converters, etc.) take dependencies directly.
I created a new custom Block and wanted to inject an IOptionsSnapshot to read my appsettings.json values. The problem is that I get an error saying there is no parameterless constructor for my custom block.
Is there a way to somehow do this injection or is this a limitation in Piranha and custom blocks.
At the moment neither Fields nor Blocks supports parameter injection into the constructor, however Fields have two initialization methods that both support parameter injection, Init() and InitManager(). Given how models are constructed the easiest solution would probably be to add the corresponding init methods to Blocks as well.
Feel free to open an issue/feature request at the GitHub repo and we can take the discussion from there!
I am trying to get better understanding of what the "context" object is in Vuex.
The context object is referred to numerous times in the Vuex documentation. For example, in https://vuex.vuejs.org/en/actions.html, we have:
Action handlers receive a context object which exposes the same set of
methods/properties on the store instance, so you can call
context.commit to commit a mutation...
I understand how to use it, and also that we can use destructuring if we only want to use the "commit" from the context object, but was hoping for a little more depth, just so I can better understand what is going on.
As a start, I found a couple ~8.5 year old posts on the "context object" as a pattern:
what is context object design pattern? and
Can you explain the Context design pattern?
However, specifically to Vuex, I'd love a better understanding of:
What is the context object / what is its purpose?
What are all the properties/methods that it is making available to use in Vuex?
Thank you!
From the documentation you pointed out you can read:
We will see why this context object is not the store instance itself when we introduce Modules later.
The main idea of the context object is to abstract the scope of the current Module. If you simply access store.state, it will always be the root state.
The context object of actions and its properties/methods are described here in the source code and also referenced in the API documentation
Here is the list:
{
state, // same as store.state, or local state if in modules
rootState, // same as store.state, only in modules
commit, // same as store.commit
dispatch, // same as store.dispatch
getters, // same as store.getters, or local getters if in modules
rootGetters // same as store.getters, only in modules
}
As a start, I found a couple ~8.5 year old posts on the "context object" as a pattern ...
I think you're reading into it too much.
I don't think the Vuex docs is referring to some specific kind of "context object" that is known and defined elsewhere, they just mean that the object that is passed to action handlers (and in other situations as described in the docs) is a custom object which they refer to as a "context" object by their own definition.
The reason why they provide this object is because it contains properties that are specific to the module for that particular action handler.
according to the source code of vuex, context is just a literal object with some properties from local, and other properties from store.
In most Dart documentation pages, some variables and functions are crossed out. like in https://api.dartlang.org/1.14.2/dart-js/dart-js-library.html
What does this signify?
In Dart metadata can be added to classes, fields, library declaratoins, parameters, ... as annotation.
#Deprecated('some reason')
class SomeClass {
String someField;
int otherField;
SomeClass({
this.someField,
#Deprecated('don\'t use this anymore") this.otherField});
}
is such an annotation and some tools like the Dart analyzer and dartdoc use this information to produce warnings (Analyzer) or other visual cues that some API still exists but should be avoided because it's planned to be removed eventually.
It signifies that the class, function, property etc. is deprecated
In Dart, annotations are used to mark something as deprecated. Notice the documented annotation on this class.
I am learning to use dependency injection with ninject. Most of the properties and methods are fairly intuitive, one that has me though is Kernel.Inject(instance);
What does the Inject method actually do as it doesn't return anything. I've looked around but search for a method called inject on a dependency injection container is a nightmare, I can't find any references to the method specifically.
Kernel.Inject(instance) will inject dependencies into an already existing object.
That's why it returns void because it takes the parameter object instance and starts to investigate it's methods and property setters looking for the [Inject] attribute. Then it will call them with the resolved instances of their parameter types. (this is called Method or Property injection)
So when contructor injection is not enoughpossible you can Kernel.Inject to fill in your dependencies for a given instance.
You can read more about this here: Ninject Injection Patterns