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Now, in the last lesson, we looked at how we can update our Realm database by simply using realm.write, and including
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inside those brackets
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whatever changes we want to make to our Realm database. Now, in this lesson, we're going to talk about how
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we can delete items.
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So I'm going to do that in the same place in the didSelectRowAt indexPath method where we click on one
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of the rows and we look inside our to-do items to find the item at that particular index, and we pull
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it out. And instead of trying to update it and toggle the done property,
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instead, I'm going to comment out this line, and I'm simply going to say realm. delete, and I'm going to
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call the delete method on our realm to delete the object that I specify. And that object is, obviously,
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going to be our item that we picked out.
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So realm.write updates our database and the changes that it's going to make is it's going to delete
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this item from our realm database.
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So, again, we're going to go inside our Shopping to-do list where we've got all of our items.
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So currently, they're all unchecked.
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And when I click on any of these rows, I'm expecting to look at that indexPath of the row and look inside
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to -do items to pick out the item at that row.
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And then I'm going to update my Realm by deleting that particular item from my Realm database.
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So let's see if it works.
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By apples, by peaches, by pears, everything is gone
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every single time I click on it.
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So this is how easy it is to delete and update your realm.
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And I think it's far more readable for human as well.
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realm.write, realm.delete, none of this context and persistent container business.
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But, again, it's totally up to you
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which one you prefer. But I'm going to uncomment these two lines of code and I'm going to delete this
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line of code because I prefer the checking functionality as the user experience for our app.
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And I'm also going to delete all of these commented out lines of code.
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So, now we're able to load new to-do list items when we select any category.
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We're able to add new items and we're also able to update and delete items in our Realm database.
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So in the next lesson, we are going to query our database and sort out all of these lines of code that
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correspond to our search bar methods.
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So for all of that and more, see you on the next lesson.