How to add CustomConditions

Engines
1

Hallo,

I want to add a CustomConditions to the FormEngine. I tried it like this, but it doesn’t worked (while validating the rule, which uses the CustomCondition, the Engine couldn’t found it):

const customConditions: ((state: EngineState) => CustomConditionsMap) =
          () =>
			({
				CustomConditionName: {
					check(
						data: IData,
						relevantEntities: Set<IIdentifier> | undefined,
						formallyIncorrectFields: Set<IIdentifier>,
						errorField: IIdentifier
					) {
						// doSomething and return boolen
					}
				}
			});
const config = ApplicationFactories.createApplicationSetup({
		...,
		additionalMiddlewares: [
                                    ...createEngineMiddlewares({ converter: customConverters(), customConditions: customConditions }),
			...createBapFormEngineMiddlewares(),
			...
		],
...});

Has anyone experience with CustomConditions and have a hint for me or can help me to found out, what is wrong?

Best regards
Nora

2

Hi Nora, there seems to be a typo. Can you try again with customConditions?

3

Morning Baschir,

Oh, I didn’t recognized the typo, when I wrote the thread. But the typo is only in the thread. I didn’t Copy/Pasted it directly from my source code.
Sorry for the confusion.

4

I corrected the typo in the thread.
Supplement:

I would have expected an attribute in the engine config, like for “externalEnumerationProvider” and “converter”, but I didn’t found anything which seams to fit.

5

Please have a look at this working example:

<INTERNAL_LINK>

<INTERNAL_LINK>

If that doesn’t help I suggest to do a debugging session :slight_smile:

6

Hi Baschir,

thanks for your answer.
My attempt based on that example.

7

The problem was, that we have overridden the FormEngineMiddleware, after setting it with the customConditions.
Now it works like in the example.