FLUID-6586: References into local record such as {source} and {sourcePath} can't be resolved in interpolated relay segments

Description

In a silly oversight, we failed to supply the localRecord argument when expanding interpolating path segments in relay rules. The following definition from the covid data monitor app fails to resolve:

modelRelay: {
                    source: {
                        context: "{map}",
                        segs: ["uiChecks", "{sourcePath}"]
                    },
                    target: "checked"
                }

Comments

• Tony Atkins [RtF] commented 2022-03-24T06:12:55.267-0400

  Would this also explain why sourcePath can't be used in a dynamic component's model? Here's an example:

  fluid.defaults("fluid.demo.sourcePath", {
      gradeNames: ["fluid.component"],
      sources: ["peas", "porridge", "hot"],
      dynamicComponents: {
        example: {
          type: "fluid.modelComponent",
          sources: "{that}.options.sources",
          options: {
            model: {
              label: "{source}",
              index: "{sourcePath}"
            }
          }
        }
      }
    });
  

  This throws:

  src\framework\core\js\Fluid.js:2972 Uncaught TypeError: Cannot read properties of undefined (reading 'composeSegments')
      at Object.fluid.parseValidModelReference (src\framework\core\js\DataBinding.js:672:48)
      at Object.fluid.parseImplicitRelay (src\framework\core\js\DataBinding.js:1284:28)
      at src\framework\core\js\DataBinding.js:1306:36
      at Object.fluid.each (src\framework\core\js\Fluid.js:653:13)
      at Object.fluid.parseImplicitRelay (src\framework\core\js\DataBinding.js:1304:15)
      at src\framework\core\js\DataBinding.js:1390:22
      at Array.map (<anonymous>)
      at fluid.establishModelRelay (src\framework\core\js\DataBinding.js:1389:43)
      at Object.fluid.expander.invokeFunc [as typeFunc] (src\framework\core\js\FluidIoC.js:3512:17)
      at Object.fluid.expandImmediateImpl (src\framework\core\js\FluidIoC.js:3408:62)
  

• Antranig Basman commented 2022-05-13T06:07:55.037-0400

  Unrelated to the fix of FLUID-6729 since without this feature it would have been impossible to store any {sourcePath} entries at all