225. Loading the Shopping List Items into the Form

Jul 22, 2026 00:52 · 3:02 · English · Whisper Turbo · 2 Kõnelejad

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

In the last lectures,

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

we did a lot of setup to get the information about the item we're

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about to edit.

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Now let's edit it.

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

I want to get the item we want to edit.

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And for this,

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in the shopping list service,

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I'll need a new method,

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which is simply get ingredient,

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which expects to get the index,

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a number,

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and which will simply return us the ingredient

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from our ingredients array.

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So the ingredient at this index.

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So with that returned,

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we now can reach out to this new method in our shopping edit component

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and store it in the edited item maybe,

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

which is an ingredient.

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So type ingredient.

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

And we do this whenever we get a

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new method.

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information that we're in the edit mode I should say so here edited item

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will be set equal to reaching out to the shopping service to

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the item we get from the get ingredient method and here we simply

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

pass our index so with this we got a lot of information

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

here now we need to update our form if we are in edit mode

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

and for this I want to get access to the form now on

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

the form we do have a local reference F

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

We can use this together with at viewchild to get access

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to it.

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So here I will actually use at viewchild and

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make sure to add the import from at Angular core.

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I will reach out to F and this will be

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the shopping list form.

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of type ng form.

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So make sure to assign this type here.

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Now,

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once we got all the new information inside of the subscribe callback,

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and that is of course important,

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

outside of there,

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this will not be run each time we get a new information,

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but it might be run before we got any information at all.

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So outside would be wrong.

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Inside of this callback here,

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

I want to reach out to my form and call

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set value here.

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and now i want to assign a new value for the name i

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will use my edited item and here the name and

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for amount you guessed it i'll also use my edited item and

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then the amount and this should make sure that whenever we select a new

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item we actually populate the form with the right values

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

we can already try this with ng serve running

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Once our page reloads,

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if I click here,

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we indeed select the correct item.

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

So that is working as expected.

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

Of course,

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

it still adds it as a new item.

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S… Speaker 1 (225. Loading the Shopping List Items into the Form)

So we need to make sure that if we are editing,

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we correctly rename this button to update or something like

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this.

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And that we then also do update the item and don't add a new one.

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Let's do this in the next lecture.

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