fmt: remove space in front of ? and ! (#14366)
Daniel Däschle
parent
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GPG Key ID:
B75D4F293C7052DB
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@ -5,6 +5,7 @@ Hello,
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In this guide, we'll build a simple web blog in V.
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The benefits of using V for web:
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- A safe, fast, language with the development agility of Python or Ruby and
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the performance of C.
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- Zero dependencies: everything you need for web development comes with the language
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@ -15,11 +16,10 @@ in a 1 MB package.
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is enough.
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- Fast development without any boilerplate.
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*Please note that V and Vweb are at a very early stage and are changing rapidly.*
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_Please note that V and Vweb are at a very early stage and are changing rapidly._
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The code is available <a href='https://github.com/vlang/v/tree/master/tutorials/code/blog'>here</a>.
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### Installing V
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```
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@ -32,17 +32,15 @@ sudo ./v symlink
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Now V should be globally available on your system.
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> On macOS use `v_macos.zip`, on Windows - `v_windows.zip`.
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If you use a BSD system, Solaris, Android, or simply want to install V
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from source, follow the simple instructions here:
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https://github.com/vlang/v#installing-v-from-source
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> If you use a BSD system, Solaris, Android, or simply want to install V
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> from source, follow the simple instructions here:
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> https://github.com/vlang/v#installing-v-from-source
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### Install SQLite development dependency
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If you don't have it already installed, look at the
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[`sqlite` README](../../vlib/sqlite/README.md) for instructions.
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### Creating a new Vweb project
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V projects can be created anywhere and don't need to have a certain structure:
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@ -94,7 +92,6 @@ with an MVC web framework, you can think of it as a controller. (Vweb is
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not an MVC framework however.) It embeds the vweb Context object, that's why we get access
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to methods like `.text()`.
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As you can see, there are no routing rules. The `index()` action handles the `/` request by default.
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Vweb often uses convention over configuration and adding a new action requires
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no routing rules either:
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@ -109,7 +106,6 @@ fn (mut app App) time() vweb.Result {
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}
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```
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<img width=662 src="https://github.com/vlang/v/blob/master/tutorials/building_a_simple_web_blog_with_vweb/img/time.png?raw=true">
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> TIP: run the following command to live-reload the server: `v watch run blog.v`
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@ -117,7 +113,6 @@ fn (mut app App) time() vweb.Result {
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The `.text(string)` method returns a plain text document with the provided
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text, which isn't frequently used in websites.
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### HTML View
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Let's return an HTML view instead. Create `index.html` in the same directory:
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@ -129,8 +124,8 @@ Let's return an HTML view instead. Create `index.html` in the same directory:
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</head>
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<body>
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<b>@message</b>
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<br>
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<img src='https://vlang.io/img/v-logo.png' width=100>
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<br />
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<img src="https://vlang.io/img/v-logo.png" width="100" />
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</body>
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</html>
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```
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@ -176,7 +171,6 @@ into a single binary file together with the web application itself.
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- All errors in the templates are guaranteed to be caught during compilation.
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### Fetching data with V ORM
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Now let's display some articles!
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@ -184,7 +178,6 @@ Now let's display some articles!
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We'll be using V's builtin ORM and a SQLite database.
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(V ORM will also support MySQL, Postgre, and SQL Server soon.)
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Add a SQLite handle to `App`:
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```v oksyntax
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@ -199,14 +192,11 @@ pub mut:
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}
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```
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In `fn main()` we'll connect to a database.
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Code in the `main()` function is run only once during app's startup, so we are going
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to have one DB connection for all requests. This improves the performance of the web application,
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since a DB connection doesn't have to be set up for each request.
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```v oksyntax
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// blog.v
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fn main() {
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@ -268,14 +258,13 @@ pub fn (app &App) index() vweb.Result {
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}
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```
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Finally, let's update our view:
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```html
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<body>
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@for article in articles
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<div>
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<b>@article.title</b> <br>
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<b>@article.title</b> <br />
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@article.text
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</div>
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@end
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@ -323,7 +312,6 @@ article := app.retrieve_article(10) or {
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}
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```
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### Adding new articles
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Create `new.html`:
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@ -334,10 +322,10 @@ Create `new.html`:
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<title>V Blog</title>
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</head>
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<body>
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<form action='/new_article' method='post'>
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<input type='text' placeholder='Title' name='title'> <br>
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<textarea placeholder='Text' name='text'></textarea>
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<input type='submit'>
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<form action="/new_article" method="post">
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<input type="text" placeholder="Title" name="title" /> <br />
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<textarea placeholder="Text" name="text"></textarea>
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<input type="submit" />
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</form>
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</body>
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</html>
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@ -373,7 +361,7 @@ not necessary).
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We need to update `index.html` to add a link to the "new article" page:
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```html
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<a href='/new'>New article</a>
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<a href="/new">New article</a>
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```
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Next we need to add the HTML endpoint to our code like we did with `index.html`:
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@ -387,7 +375,6 @@ pub fn (mut app App) new() vweb.Result {
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Re-running this code will now allow us to add new posts to our blog endpoint
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### JSON endpoints
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This tutorial used the traditional server-side rendering. If you prefer
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@ -406,10 +393,10 @@ pub fn (mut app App) articles() vweb.Result {
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}
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```
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<img width=662 src="https://github.com/vlang/v/blob/master/tutorials/building_a_simple_web_blog_with_vweb/img/articles_json.png?raw=true">
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### Persistent data
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If one wants to persist data they need to use a file instead of memory SQLite Database.
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Replace the db setup code with this instead:
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@ -422,7 +409,6 @@ If the database file doesn't exist it will create it. The second command will
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create the table `Article` if none exists already. Now every time the
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app is run you will see the articles created from the previous executions
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To be continued...
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For an example of a more sophisticated web app written in V, check out Vorum: https://github.com/vlang/vorum
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@ -6,7 +6,6 @@ from a terminal in an easy and structured manner.
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The module provides an easy way to prompt the user for
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questions or even make a REPL or an embedded console.
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# Usage:
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```v
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@ -18,6 +17,7 @@ println(answer)
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```
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or just:
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```v
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import readline { read_line }
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@ -1,4 +1,4 @@
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vlib/v/checker/tests/go_wait_or.vv:11:17: error: unexpected `?`, the function `wait` does neither return an optional nor a result
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vlib/v/checker/tests/go_wait_or.vv:11:16: error: unexpected `?`, the function `wait` does neither return an optional nor a result
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9 | go d(1)
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10 | ]
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11 | r := tg.wait()?
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@ -19,7 +19,7 @@ vlib/v/checker/tests/go_wait_or.vv:19:13: error: unexpected `or` block, the func
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| ~~~~~~~~~~~~~~~~~~~~~~~
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20 | tg2[0].wait()?
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21 | tg3 := [
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vlib/v/checker/tests/go_wait_or.vv:20:16: error: unexpected `?`, the function `wait` does neither return an optional nor a result
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vlib/v/checker/tests/go_wait_or.vv:20:15: error: unexpected `?`, the function `wait` does neither return an optional nor a result
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18 | ]
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19 | tg2.wait() or { panic('problem') }
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20 | tg2[0].wait()?
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@ -1,11 +1,11 @@
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vlib/v/checker/tests/optional_propagate_nested.vv:10:19: error: to propagate the optional call, `xx_prop` must return an optional
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vlib/v/checker/tests/optional_propagate_nested.vv:10:18: error: to propagate the optional call, `xx_prop` must return an optional
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8 |
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9 | fn xx_prop() string {
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10 | s := ret(raise()?)
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| ^
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11 | return s
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12 | }
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vlib/v/checker/tests/optional_propagate_nested.vv:28:22: error: to propagate the optional call, `aa_propagate` must return an optional
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vlib/v/checker/tests/optional_propagate_nested.vv:28:21: error: to propagate the optional call, `aa_propagate` must return an optional
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26 |
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27 | fn (mut s St) aa_propagate() {
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28 | f := retf(s.raise()?)
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@ -1,4 +1,4 @@
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vlib/v/checker/tests/propagate_option_with_result_err.vv:6:8: error: to propagate an option, the call must also return an optional type
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vlib/v/checker/tests/propagate_option_with_result_err.vv:6:7: error: to propagate an option, the call must also return an optional type
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4 |
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5 | fn bar() ?string {
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6 | foo()?
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@ -1,4 +1,4 @@
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vlib/v/parser/tests/defer_propagate.vv:9:15: error: error propagation not allowed inside `defer` blocks
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vlib/v/parser/tests/defer_propagate.vv:9:14: error: error propagation not allowed inside `defer` blocks
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7 | mut a := 0
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8 | defer {
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9 | a = test1()?
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@ -1,4 +1,4 @@
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vlib/v/parser/tests/defer_propagate2.vv:16:13: error: error propagation not allowed inside `defer` blocks
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vlib/v/parser/tests/defer_propagate2.vv:16:12: error: error propagation not allowed inside `defer` blocks
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14 | dump(s.x)
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15 | defer {
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16 | s.close()?
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