Help Initializing Tag Struct inside of Post Struct. What am I doing Wrong?

Man Thank you! I was getting the error "Tag is not String", but I couldn't figure it our. This makes sense I needed to pass a completed Tag instance into the the Post. I have learned a ton from treehouse! Thanks Again.

Correct me if i'm wrong, but i believe the title, author, and tag should all be variables and not constants... see if that helps.

The second task requires a method adding to the struct. It is called description. It takes no parameters and returns a string. Inside, it just takes the three stored properties and interpolates them into a string which it returns.

So, the method skeleton looks like:

func description() -> String {

}

Inside, gather the stored properties into a string like "\(title) by \(author). Filed under \(tag.name)". The last one needs a little thought as you can't interpolate the tag; you want to use its name property. Add that string inside the method and return it:

func description() -> String {
  return "\(title) by \(author). Filed under \(tag.name)"
}

Then you just create a constant and call the method on the firstPost instance:

let postDescription = firstPost.description()

And that's it

Steve.

Hi there,

Your firstPost constant holds a string, not a Post because you have created a Post then called .description() on that post, which returns a string.

For firstPost to hold a Post remove the call to description:

let firstPost = Post(title: "SomeTitle", author: "Some Guy", tag: Tag(name: "TAGTAG"))

Then to get the description for your postDescription constant, call description on firstPost:

let postDescription = firstPost.description()

The challenge is expecting firstPost to hold an instance of Post but that's not what it's getting so the challenge is, correctly, failing.

Make sense?

Steve.

Fiodar: You misspelled "iOSDevelopment"

let firstPost = Post(title: "iOSDevelopment", author: "Apple", tag: Tag(name: "swift"))

[MOD: edited code block - srh]

Hi Mitchell,

The strings used by way of example within the challenge are just that, examples. You can use whatever values you want as long as the name element of the Tag instance gets assigned into postDescription, the challenge will pass. This works fine:

let firstPost = Post(title: "Title", author: "S Hunter", tag: Tag(name: "a tag"))
let postDescription = firstPost.description()

Make sense?

Steve.

Hi Jun,

You are passing a String into the init method then creating a Tag instance inside that method. The challenge is expecting to be able to pass a Tag instance into the struct to create the instance.

First, delete the init method; you don't need it here. Then, where you create firstPost, pass a new Tag instance in, rather than a String. Something like:

let firstPost = Post(title: "A title", author: "An author", tag: Tag(name: "aTag"))

Let me know how you get on.

Steve.

Give me a second - and do you have the link to the current challenge? This one has been retired as it is covering an old Swift version.

The challenges seem to be working here. Can you post your code?

Steve.

OK - you need to delete the let aTag line - that was just an example in my description, not part of this challenge.

Next, move the whole func inside the struct - that code is part of the Post struct. On a style point, consider your indents - having correctly indented code makes it much easier to read. Indeed, some languages require indents for the code to work, e.g. Python.

The rest looks fine.

Steve.