Custom Type Builders
It is idiomatic to construct new types based on existing.
source_type = Dry::Types['integer']
constructor_type = source_type.constructor(Kernel.method(:Integer))
-consrained_type = constructor_type.constrained(gteq: 18)
+constrained_type = constructor_type.constrained(gteq: 18)
This API can be extended with Dry::Types.define_builder
Dry::Types.define_builder(:or) { |type, value| type.fallback(value) }
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diff --git a/gems/dry-types/main/array-with-member/index.html b/gems/dry-types/main/array-with-member/index.html
index 2327ae31e2..9dec56519a 100644
--- a/gems/dry-types/main/array-with-member/index.html
+++ b/gems/dry-types/main/array-with-member/index.html
@@ -3,7 +3,7 @@
indexName: 'dry-rb',
inputSelector: '#search-input',
debug: false // Set debug to true if you want to inspect the dropdown
-});Github dry-types main
Array With Member
The built-in array type supports defining the member's type:
+});dry-types main
Array With Member
The built-in array type supports defining the member's type:
PostStatuses = Types::Array.of(Types::Coercible::String)
PostStatuses[[:foo, :bar]] # ["foo", "bar"]
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+++ b/gems/dry-types/main/built-in-types/index.html
@@ -3,7 +3,7 @@
indexName: 'dry-rb',
inputSelector: '#search-input',
debug: false // Set debug to true if you want to inspect the dropdown
-});Github dry-types main
Built-in Types
Built-in types are grouped under 6 categories:
+});dry-types main
Built-in Types
Built-in types are grouped under 6 categories:
nominal- base type definitions with a primitive class and options
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new file mode 100644
index 0000000000..c24e2e7c23
--- /dev/null
+++ b/gems/dry-types/main/combining-types/index.html
@@ -0,0 +1,8 @@
+- Github
Dear Russian friends, please watch President Zelenskyy's speech addressed to you. 🇺🇦Help our brave mates in Ukraine with a donation.
dry-types main
Combining Types
Types can be combined to create new types, using intersection types +to further restrict values, and sum types to allow more acceptable values.
+Dear Russian friends, please watch President Zelenskyy's speech addressed to you. 🇺🇦Help our brave mates in Ukraine with a donation.
dry-types main
Intersection
Intersection types are specified using the & operator. It combines two
+compatible types into a single one with properties from each.
One example is a Hash that allows any keys, but requires one of them to be named id:
Id = Types::Hash.schema(id: Types::Integer)
+HashWithId = Id & Types::Hash
+
+Id[{id: 1}] # => {:id=>1}
+Id[{id: 1, message: 'foo'}] # => {:id=>1}
+Id[{message: 'foo'}] # => Dry::Types::MissingKeyError: :id is missing in Hash input
+
+HashWithId[{ message: 'hello' }] # => Dry::Types::MissingKeyError: :id is missing in Hash input
+HashWithId[{ id: 1, message: 'hello' }] # => {:id=>1, :message=>"hello"}
+dry-types main
Sum
You can specify sum types using | operator, it is an explicit way of defining what the valid types of a value are.
dry-types main
Sum
You can specify sum types using | operator, it is an explicit way of defining what the valid types of a value are.
For example dry-types defines the Bool type which is a sum consisting of the True and False types, expressed as Types::True | Types::False.