Helper in Loop Always Appears to be at the End #1849

slarti-b · 2022-04-08T15:50:17Z

I am trying to "group" the output by not repeating the value of a given field if it hasn't changed. I would rather avoid re-implementing the whole #each helper, so I thought that I could do a helper that would look at a previous row. However, the context I get inside such a helper doesn't appear to either include the array currently being looped or the position! I can pass in the @index for the latter, but where is the object being looped?

I've defined a dummy helper that just outputs the arguments. Tried calling both as block and normal helper. No luck. See https://jsfiddle.net/sempuzac/1/

E.g. given a data set (I know the data set is already sorted)

{
  "summary": {
    "foo": "A"
  },
  "names": [
    {
      "firstName": "Foo",
      "lastname": "Bar",
      "team": "red"
    },
    {
      "firstName": "Joe",
      "lastname": "Blogs",
      "team": "red"
    },
    {
      "firstName": "Anne",
      "lastname": "Other",
      "team": "green"
    },
    {
      "firstName": "Someone",
      "lastname": "Else",
      "team": "black"
    },
    {
      "firstName": "Last",
      "lastname": "Person",
      "team": "black"
    }
  ]
}

If I do {{#each names}} and put my new helper inside the loop then

I have the current row as this - OK
But _parent in the context is just the root element
- If this is the row then the parent should be the names array, shouldn't it
- How do I find out what element is being iterated? I could pass in @index and subtract one inside my Helper if I knew that
Every call to my helper includes a data element like the below - shouldn't it have the correct index for the row I call it from?

data:
  first: false
  index: 4
  key: 4
  last: true

Example of What I'm Trying to Do

Essentially, I can generate the following

Team		Name
red	0	Foo Bar
red	1	Joe Blogs
green	2	Anne Other
black	3	Someone Else
black	4	Last Person

What i want to generate is the following

Team		Name
red	1	Foo Bar
	2	Joe Blogs
green	1	Anne Other
black	1	Someone Else
	2	Last Person

The text was updated successfully, but these errors were encountered:

jaylinski · 2022-05-25T20:42:47Z

Does this only happen in strict-mode? (If yes, probably related to #1855)

jaylinski · 2023-08-03T23:41:04Z

shouldn't it have the correct index for the row I call it from?

Yes, it should have. I'm not sure why this works in the playground but not in the jsfiddle... 🤔

jaylinski added the needs investigation label Apr 8, 2022

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Helper in Loop Always Appears to be at the End #1849

Helper in Loop Always Appears to be at the End #1849

slarti-b commented Apr 8, 2022 •

edited

jaylinski commented May 25, 2022

jaylinski commented Aug 3, 2023

Helper in Loop Always Appears to be at the End #1849

Helper in Loop Always Appears to be at the End #1849

Comments

slarti-b commented Apr 8, 2022 • edited

jaylinski commented May 25, 2022

jaylinski commented Aug 3, 2023

slarti-b commented Apr 8, 2022 •

edited