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doc(er): add documentation on UK constraint

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Tom PERRILLAT-COLLOMB 2022-12-15 19:03:00 +00:00
parent 32a8061cc2
commit c7f085a138
2 changed files with 5 additions and 5 deletions
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6
docs/syntax/entityRelationshipDiagram.md
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@ -234,14 +234,14 @@ The `type` and `name` values must begin with an alphabetic character and may con
#### Attribute Keys and Comments
Attributes may also have a `key` or comment defined. Keys can be "PK" or "FK", for Primary Key or Foreign Key. And a `comment` is defined by double quotes at the end of an attribute. Comments themselves cannot have double-quote characters in them.
Attributes may also have a `key` or comment defined. Keys can be "PK", "FK" or "UK", for Primary Key, Foreign Key or Unique Key. And a `comment` is defined by double quotes at the end of an attribute. Comments themselves cannot have double-quote characters in them.
```mermaid-example
erDiagram
CAR ||--o{ NAMED-DRIVER : allows
CAR {
string allowedDriver FK "The license of the allowed driver"
string registrationNumber
string registrationNumber UK
string make
string model
}
@ -260,7 +260,7 @@ erDiagram
CAR ||--o{ NAMED-DRIVER : allows
CAR {
string allowedDriver FK "The license of the allowed driver"
string registrationNumber
string registrationNumber UK
string make
string model
}

4
packages/mermaid/src/docs/syntax/entityRelationshipDiagram.md
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@ -164,14 +164,14 @@ The `type` and `name` values must begin with an alphabetic character and may con
#### Attribute Keys and Comments
Attributes may also have a `key` or comment defined. Keys can be "PK" or "FK", for Primary Key or Foreign Key. And a `comment` is defined by double quotes at the end of an attribute. Comments themselves cannot have double-quote characters in them.
Attributes may also have a `key` or comment defined. Keys can be "PK", "FK" or "UK", for Primary Key, Foreign Key or Unique Key. And a `comment` is defined by double quotes at the end of an attribute. Comments themselves cannot have double-quote characters in them.
```mermaid-example
erDiagram
CAR ||--o{ NAMED-DRIVER : allows
CAR {
string allowedDriver FK "The license of the allowed driver"
string registrationNumber
string registrationNumber UK
string make
string model
}