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Allow unicode
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treagod committed Sep 5, 2024
1 parent b237bd4 commit ac1427b
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15 changes: 14 additions & 1 deletion docs/docs/models-and-databases/reference/fields.md
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Expand Up @@ -249,7 249,6 @@ The `max_size` argument is optional and defaults to 50 characters. It allows to
The `slugify` argument allows specifying the field from which the slug should be generated. This is useful when you want the slug to be automatically derived from another field.

```crystal
class Article < Marten::Model
field :title, :string
field :slug, :slug, slugify: :title
Expand All @@ -262,6 261,20 @@ article.slug # => "my-article-48e810f2" - the suffix is a random string

When an Article object is saved, the slug field will automatically generate a slug based on the title field if no custom slug is provided.

:::warning
The slugification functionality also transforms Unicode characters and symbols. When filtering a model by the query parameter, it may be necessary to decode the slug parameter first, because although the browser may show you the unicode characters, it will send the encoded characters in the HTTP request:

```crystal
class ArticleDetailsHandler < Marten::Handler
def get
article = Article.get(slug: URI.decode(params[:slug].to_s))
# …
end
end
```
:::

:::info
As slug fields are usually used to query records, they are indexed by default. You can use the [`index`](#index) option (`index: false`) to disable auto-indexing.
:::
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5 changes: 5 additions & 0 deletions spec/marten/core/sluggable_spec.cr
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Expand Up @@ -12,6 12,11 @@ describe Marten::Core::Sluggable do
slug.should eq("testtitle123")
end

it "handles emojis" do
value_with_emojis = "🚀 TRAVEL & PLACES"
slug = Marten::Core::SluggableSpec::SlugGenerator.new.generate_slug(value_with_emojis, max_size)
slug.should eq("🚀-travel-places")
end
it "converts the string to lowercase" do
g_slug.should eq("test-title-123545434")
end
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4 changes: 2 additions & 2 deletions spec/marten/db/field/slug_spec.cr
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Expand Up @@ -85,15 85,15 @@ describe Marten::DB::Field::Slug do

article.save

article.slug.not_nil!.should eq("berraschungsmoment")
article.slug.not_nil!.should eq("überraschungsmoment")
end

it "removes emoji and special characters and slugifies the title" do
article = Marten::DB::Field::SlugSpec::Article.new(title: "🚀 TRAVEL & PLACES")

article.save

article.slug.not_nil!.should eq("travel-places")
article.slug.not_nil!.should eq("🚀-travel-places")
end

it "trims leading and trailing whitespace and slugifies the title" do
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11 changes: 4 additions & 7 deletions src/marten/core/sluggable.cr
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Expand Up @@ -2,23 2,20 @@ module Marten
module Core
# The Sluggable module provides functionality for generating URL-friendly slugs from strings.
module Sluggable
private NON_ALPHANUMERIC_RE = /[^\w\s-]/
private NON_ALPHANUMERIC_RE = /[^\p{L}\p{N}\p{So}\s-]/
private WHITESPACE_HYPHEN_RE = /[-\s] /
private NON_ASCII_RE = /[^\x00-\x7F]/

# Generates a slug from the given value, ensuring the resulting slug does not exceed the specified max_size.
#
# The slug is created by:
# 1. Removing non-alphanumeric characters (except whitespace and hyphens).
# 1. Removing non-alphanumeric characters (except for Unicode letters, numbers, symbols, whitespace, and hyphens).
# 2. Converting the string to lowercase.
# 3. Replacing sequences of whitespace and hyphens with a single hyphen.
# 4. Removing non-ASCII characters.
# 5. Stripping trailing hyphens and underscores of the slug.
# 6. Truncate the slug to the maximum size
# 4. Stripping trailing hyphens and underscores from the slug.
# 5. Truncating the slug to the specified max_size.
def generate_slug(value, max_size)
slug = value.gsub(NON_ALPHANUMERIC_RE, "").downcase
slug = slug.gsub(WHITESPACE_HYPHEN_RE, "-")
slug = slug.gsub(NON_ASCII_RE, "")
slug[...(max_size)].strip("-_")
end
end
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