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Changelog

[1.0.0-alpha.2] - 2024-06-05

Added

  • #[schemars(extend("key" = value))] attribute which can be used to add properties (or replace existing properties) in a generated schema (GREsau#50 / GREsau#297)
    • Can be set on a struct, enum, or enum variant
    • Value can be any expression that results in a value implementing Serialize
    • Value can also be a JSON literal following the rules of serde_json::json!(value) macro, i.e. it can interpolate other values that implement Serialize

[1.0.0-alpha.1] - 2024-05-27

Added

  • json_schema! macro for creating a custom Schema
  • Implement JsonSchema for uuid 1.x types, under the optional uuid1 feature flag
  • SchemaSettings::draft2020_12() to construct settings conforming to JSON Schema draft 2020-12

Changed (⚠️ breaking changes ⚠️)

  • The Schema type is now defined as a thin wrapper around a serde_json::Value
  • The default SchemaSettings (used by the schema_for!()/schema_for_value!() macros and SchemaGenerator::default()) now conform to JSON Schema draft 2020-12 instead of draft 7.
  • Schemas generated using SchemaSettings::draft2019_09() (and draft2020_12() and default()) now use $defs instead of definitions. While using definitions is allowed by the spec, $defs is the preferred property for storing reusable schemas.
  • JsonSchema::schema_name() now returns Cow<'static, str> instead of String
  • JsonSchema::is_referenceable() has been removed, and replaced with the more clearly-named JsonSchema::always_inline() (which should returns the opposite value to what is_referenceable returned!)
  • The SchemaGenerator.definitions field is now a serde_json::Map<String, Value>
  • Macros/functions that previously returned a RootSchema now return a Schema instead
  • All optional dependencies are now suffixed by their version:
    • chrono is now chrono04
    • either is now either1
    • smallvec is now smallvec1
    • url is now url2
    • bytes is now bytes1
    • rust_decimal is now rust_decimal1
    • enumset is now enumset1
    • smol_str is now smol_str02
    • semver is now semver1
    • indexmap2, arrayvec07 and bigdecimal04 are unchanged

Removed (⚠️ breaking changes ⚠️)

  • Removed deprecated SchemaGenerator methods make_extensible, schema_for_any and schema_for_none
  • Removed the schema module
    • The Schema type is now accessible from the crate root (i.e. schemars::Schema instead of schemars::schema::Schema)
    • All other types that were in the module have been removed:
      • RootSchema
      • SchemaObject
      • Metadata
      • SubschemaValidation
      • NumberValidation
      • StringValidation
      • ArrayValidation
      • ObjectValidation
      • InstanceType
      • SingleOrVec
  • Removed schemars::Set and schemars::Map type aliases
  • Removed the impl_json_schema feature flag - JsonSchema is now always implemented on Schema
  • Remove methods visit_schema_object and visit_root_schema from the Visitor trait (visit_schema is unchanged)
    • Visitors that previously defined visit_schema_object should instead define visit_schema and use an if let Some(obj) = schema.as_object_mut() or similar construct
  • Old versions of optional dependencies have been removed - all of these have newer versions (shown in brackets) which are supported by schemars
    • indexmap (consider using indexmap2)
    • uuid08 (consider using uuid1)
    • arrayvec05 (consider using arrayvec07)
    • bigdecimal03 (consider using bigdecimal04)
  • Remove the retain_examples field from SetSingleExample, which is now a unit struct

[0.8.21] - 2024-05-23

Fixed:

[0.8.20] - 2024-05-18

Fixed:

  • Revert unintentional change in behaviour when combining default and required attributes (GREsau#292)

[0.8.19] - 2024-05-06

Fixed:

  • Regression that caused a compile error when deriving JsonSchema on an enum with no variants (GREsau#287)

[0.8.18] - 2024-05-06

Fixed:

  • Reduce size of MIR output (and improve release-mode compile time) when deriving JsonSchema on enums (GREsau#266 / GREsau#286)

[0.8.17] - 2024-04-28

Changed:

  • Update to syn 2.0, which should improve compile times in many cases (GREsau#281)

[0.8.16] - 2023-11-11

Fixed:

  • Reduce size of MIR output (and improve release-mode compile time) when deriving JsonSchema

[0.8.15] - 2023-09-17

Added:

  • Implement JsonSchema for BigDecimal from bigdecimal 0.4 (GREsau#237)

[0.8.14] - 2023-09-17

Added:

  • Add #[schemars(inner(...)] attribute to specify schema for array items (GREsau#234)

Changed:

  • New optional associated function on JsonSchema trait: schema_id(), which is similar to schema_name(), but does not have to be human-readable, and defaults to the type name including module path. This allows schemars to differentiate between types with the same name in different modules/crates (GREsau#62 / GREsau#247)

Fixed:

  • Schemas for rust_decimal::Decimal and bigdecimal::BigDecimal now match how those types are serialized by default, i.e. as numeric strings (GREsau#248)

[0.8.13] - 2023-08-28

Added:

Changed:

  • Minimum supported rust version is now 1.60.0

[0.8.12] - 2023-02-26

Added:

  • Implement JsonSchema for smol_str::SmolStr (GREsau#72)

Changed:

  • Change serde_json dependency min version to 1.0.25 (was 1.0.0) (GREsau#192)

[0.8.11] - 2022-10-02

Added:

  • Replace auto-inferred trait bounds with bounds specified in #[schemars(bound = "...")] attribute

Changed:

  • Derived JsonSchema now respects attributes on unit enum variants (GREsau#152)
  • Minimum supported rust version is now 1.45.0

[0.8.10] - 2022-05-17

  • Undo "Support generic default values in default attributes (GREsau#83)" as it inadvertently introduced a breaking change (GREsau#144)

[0.8.9] - 2022-05-16

Added:

  • Support generic default values in default attributes (GREsau#83)
    • This inadvertently introduced a breaking change and was removed in 0.8.10
  • Add missing MIT licence text for usage of code from regex_syntax crate (GREsau#132)
  • Support uuid v1 and arrayvec 0.7 via feature flags uuid1 and arrayvec07 (GREsau#142)
    • This also adds uuid08 and arrayvec05 feature flags for the previously supported versions of these crates. The existing uuid and arrayvec flags are still supported for backward-compatibility, but they are deprecated.
    • Similarly, indexmap1 feature flag is added, and indexmap flag is deprecated.

[0.8.8] - 2021-11-25

Added:

  • Implement JsonSchema for types from rust_decimal and bigdecimal crates (GREsau#101)

Fixed:

  • Fixes for internally tagged enums and flattening additional_properties (GREsau#113)

[0.8.7] - 2021-11-14

Added:

  • Implement JsonSchema for EnumSet (GREsau#92)

Fixed:

  • Do not cause compile error when using a default value that doesn't implement Serialize (GREsau#115)

[0.8.6] - 2021-09-26

Changed:

  • Use oneOf instead of anyOf for enums when possible (GREsau#108)

[0.8.5] - 2021-09-20

Fixed:

  • Allow fields with plain #[validate] attributes (GREsau#109)

[0.8.4] - 2021-09-19

Added:

  • #[schemars(schema_with = "...")] attribute can now be set on enum variants.
  • Deriving JsonSchema will now take into account #[validate(...)] attributes, compatible with the validator crate (GREsau#78)

[0.8.3] - 2021-04-05

Added:

  • Support for #[schemars(crate = "...")] attribute to allow deriving JsonSchema when the schemars crate is aliased to a different name (GREsau#55 / GREsau#80)
  • Implement JsonSchema for bytes::Bytes and bytes::BytesMut (GREsau#68)

Fixed:

[0.8.2] - 2021-03-27

Added:

  • Enable generating a schema from any serializable value using schema_for_value!(...) macro or SchemaGenerator::root_schema_for_value()/SchemaGenerator::into_root_schema_for_value() methods (GREsau#75)
  • #[derive(JsonSchema_repr)] can be used on C-like enums for generating a serde_repr-compatible schema (GREsau#76)
  • Implement JsonSchema for url::Url (GREsau#63)

[0.8.1] - 2021-03-23

Added:

  • SchemaGenerator::definitions_mut() which returns a mutable reference to the generator's schema definitions
  • Implement JsonSchema for slices

Changed:

  • Minimum supported rust version is now 1.37.0
  • Deriving JsonSchema on enums now sets additionalProperties to false on generated schemas wherever serde doesn't accept unknown properties. This includes non-unit variants of externally tagged enums, and struct-style variants of all enums that have the deny_unknown_fields attribute.
  • Schemas for HashSet and BTreeSet now have uniqueItems set to true (GREsau#64)

Fixed

  • Fix use of #[serde(transparent)] in combination with #[schemars(with = ...)] (GREsau#67)
  • Fix clippy field_reassign_with_default warning in schemars_derive generated code in rust <1.51 (GREsau#65)
  • Prevent stack overflow when using inline_subschemas with recursive types

[0.8.0] - 2020-09-27

Added:

  • visit::Visitor, a trait for updating a schema and all schemas it contains recursively. A SchemaSettings can now contain a list of visitors.
  • into_object() method added to Schema as a shortcut for into::<SchemaObject>()
  • Preserve order of schema properties under preserve_order feature flag (GREsau#32)
  • SchemaGenerator::take_definitions() which behaves similarly to the now-removed into_definitions() method but without consuming the generator
  • SchemaGenerator::visitors_mut() which returns an iterator over a generator's settings's visitors
  • SchemaSettings::inline_subschemas - enforces inlining of all subschemas instead of using references (GREsau#44)

Removed (BREAKING CHANGES):

  • SchemaSettings::bool_schemas - this has been superseded by the ReplaceBoolSchemas visitor
  • SchemaSettings::allow_ref_siblings - this has been superseded by the RemoveRefSiblings visitor
  • SchemaSettings no longer implements PartialEq
  • SchemaGenerator::into_definitions() - this has been superseded by SchemaGenerator::take_definitions()

Changed:

  • BREAKING CHANGE Minimum supported rust version is now 1.36.0

Fixed:

  • BREAKING CHANGE unknown items in #[schemars(...)] attributes now cause a compilation error (GREsau#18)

Deprecated:

  • make_extensible, schema_for_any, and schema_for_none methods on SchemaGenerator

[0.7.6] - 2020-05-17

Added:

  • #[schemars(example = "...")] attribute for setting examples on generated schemas (GREsau#23)

[0.7.5] - 2020-05-17

Added:

  • Setting #[deprecated] attribute will now cause generated schemas to have the deprecated property set to true
  • Respect #[serde(transparent)] attribute (GREsau#17)
  • #[schemars(title = "...", description = "...")] can now be used to set schema title/description. If present, these values will be used instead of doc comments (GREsau#13)

Changed:

  • schemars_derive is now an optional dependency, but included by default

[0.7.4] - 2020-05-16

Added:

  • If a struct is annotated with #[serde(deny_unknown_fields)], generated schema will have additionalProperties set to false (GREsau#30)
  • Set type property to string on simple enums (GREsau#28)

[0.7.3] - 2020-05-15

Added:

  • #[schemars(schema_with = "...")] attribute can be set on variants and fields. This allows you to specify another function which returns the schema you want, which is particularly useful on fields of types that don't implement the JsonSchema trait (GREsau#15)

Fixed

  • #[serde(with = "...")]/#[schemars(with = "...")] attributes on enum variants are now respected
  • Some compiler errors generated by schemars_derive should now have more accurate spans

[0.7.2] - 2020-04-30

Added:

  • Enable deriving JsonSchema on adjacent tagged enums (GREsau#4)

[0.7.1] - 2020-04-11

Added:

Fixed

  • Fixed a bug in schemars_derive causing a compile error when the default, skip_serializing_if, and serialize_with/with attributes are used together (GREsau#26)

[0.7.0] - 2020-03-24

Changed:

  • BREAKING CHANGE - SchemaSettings can no longer be created using struct initialization syntax. Instead, if you need to use custom schema settings, you can use a constructor function and either:
    • assign it to a mut variable and modify its public fields
    • call the with(|s| ...) method on the settings and modify the settings inside the closure/function (as in the custom_settings.rs example)

Fixed:

  • When deriving JsonSchema on structs, Option<T> struct fields are no longer included in the list of required properties in the schema (GREsau#11)
  • Fix deriving JsonSchema when a non-std String type is in scope (GREsau#19)
  • This will now compile: #[schemars(with="()")]

Added:

  • Added allow_ref_siblings setting to SchemaSettings. When enabled, schemas with a $ref property may have other properties set.
  • Can create JSON Schema 2019-09 schemas using SchemaSettings::draft2019_09() (which enables allow_ref_siblings)

[0.6.5] - 2019-12-29

Added:

  • Implemented JsonSchema on types from smallvec and arrayvec (as optional dependencies)

[0.6.4] - 2019-12-27

Added:

  • Implemented JsonSchema on types from indexmap, either and uuid (as optional dependencies)

Changed

  • Remove trait bounds from Map/Set JsonSchema impls. They are unnecessary as we never create/use any instances of these types.

[0.6.3] - 2019-12-27

  • No actual code changes - this version was just published to fix broken README on crates.io

[0.6.2] - 2019-12-27

Added:

Changed:

  • Rename derive_json_schema to impl_json_schema. derive_json_schema is still available for backward-compatibility, but will be removed in a future version.
  • Improve schema naming for deriving on remote types. A #[serde(remote = "Duration")] attribute is now treated similarly to #[serde(rename = "Duration")].
  • Ensure root schemas do not have a $ref property. If necessary, wrap the $ref in an allOf.

[0.6.1] - 2019-12-09

Fixed:

  • Fix a compile error that can occur when deriving JsonSchema from a project that doesn't reference serde_json

[0.6.0] - 2019-12-09

Added:

  • When deriving JsonSchema, the schema's title and description are now set from #[doc] comments (GREsau#7)
  • When deriving JsonSchema on structs using a #[serde(default)] attribute, the schema's properties will now include default, unless the default value is skipped by the field's skip_serializing_if function (GREsau#6)

Changed:

  • When the option_nullable setting is enabled (e.g. for openapi 3), schemas for Option<T> will no longer inline T's schema when it should be referenceable.

[0.5.1] - 2019-10-30

Fixed:

  • Added missing doc comment for title schema property

[0.5.0] - 2019-10-30

Added:

  • Implemented JsonSchema for more standard library types (GREsau#3)

Changed:

  • Unsigned integer types (usize, u8 etc.) now have their minimum explicitly set to zero
  • Made prepositions/conjunctions in generated schema names lowercase
    • e.g. schema name for Result<MyStruct, Vec<String>> has changed from "Result_Of_MyStruct_Or_Array_Of_String" to "Result_of_MyStruct_or_Array_of_String"
  • Some provided JsonSchema implementations with the same type but different formats (e.g. i8 and usize) used the type as their name. They have now been updated to use format as their name.
    • Previously, schema generation would incorrectly assume types such as MyStruct<i8> and MyStruct<usize> were identical, and give them a single schema definition called MyStruct_for_Integer despite the fact they should have different schemas. Now they will each have their own schema (MyStruct_for_i8 and MyStruct_for_usize respectively).