Struct Change 

pub struct Change {
    pub path: String,
    pub kind: ChangeKind,
    pub span: Span,
    pub source_span: Option<Span>,
}

A change that represents a meaningful difference between the two schemas. Changes have a direction: from source to target. For example, if kind is AddField, it means the field does not exist in the source schema but it does exist in the target schema.

Fields

path: String

Where the change happened in the schema. It is dot separated where relevant. For example if the change happened in a field argument, the path will be something like ParentTypeName.fieldName.argumentName.

See crate::path::Path for the full documentation.

kind: ChangeKind

The nature of the change.

span: Span

Contents depend on the change kind:

• [ChangeQueryType]/[ChangeMutationType]/[ChangeSubscriptionType]: the new type
• [AddObjectType]/[AddUnion]/[AddEnum]/[AddScalar]/[AddInterface]/[AddInputObject]/[AddSchemaDefinition]/[AddDirectiveDefinition]: the whole definition.
• [AddInterfaceImplementation]/[RemoveInterfaceImplementation]: empty
• [ChangeFieldType]/[ChangeFieldArgumentType]: the new type
• [RemoveObjectType]/[RemoveField]/[RemoveUnion]/[RemoveUnionMember]/[RemoveEnum]/[RemoveScalar]/[RemoveInterface]/[RemoveDirectiveDefinition]/[RemoveSchemaDefinition]/[RemoveInputObject]/[RemoveFieldArgument]/[RemoveFieldArgumentDefault]: empty
• [AddField]: the whole field definition
• [AddUnionMember]: the union member added
• [AddEnumValue]/[RemoveEnumValue]: empty
• [AddFieldArgument]: the value of the argument, potentially with the default
• [AddFieldArgumentDefault]/[ChangeFieldArgumentDefault]: the default value of the argument
• [ChangeDescription]: the new description, or empty if the description was removed

source_span: Option<Span>

The span of the corresponding content in the source schema, when there is meaningful content there to point to. None otherwise, in particular for change kinds where the item only exists in the target schema (e.g. [AddField]) or carries no content on either side (e.g. [AddInterfaceImplementation]/[RemoveInterfaceImplementation]).

Currently populated for:

• [ChangeFieldType]/[ChangeFieldArgumentType]: the old type
• [ChangeFieldArgumentDefault]: the old default value of the argument
• [ChangeDescription]: the old description, or None if the description was added
• [RemoveField]/[RemoveEnumValue]/[RemoveUnionMember]: the removed field/value/member
• [RemoveFieldArgument]: the removed argument
• [RemoveFieldArgumentDefault]: the removed default value of the argument
• [RemoveSchemaDefinition]: the removed schema definition
• [RemoveDirective]: the removed directive usage

Trait Implementations

impl Clone for Change

fn clone(&self) -> Change

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Change

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Change

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Change

impl Hash for Change

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Change

fn cmp(&self, other: &Change) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Change

fn eq(&self, other: &Change) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialOrd for Change

fn partial_cmp(&self, other: &Change) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for Change

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Change