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Merge pull request #3917 from tomperr/feature/3910_er_unique_key

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feat(er): add unique key
This commit is contained in:
Knut Sveidqvist
2022-12-16 13:03:30 +01:00
committed by GitHub
parent 1bf636d697 c7f085a138
commit 3e64b439ce
5 changed files with 25 additions and 10 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
string[] parts
@@ -261,7 +261,7 @@ 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
string[] parts