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ColumnDefinition

Struct ColumnDefinition 

Source
pub struct ColumnDefinition {
    pub name: String,
    pub data_type: String,
    pub nullable: bool,
    pub primary_key: bool,
    pub auto_increment: bool,
    pub unsigned: bool,
    pub default: Option<String>,
    pub comment: Option<String>,
}
Expand description

单个字段定义(对齐 PHP think\db\Fetch::getFields 返回的单字段元数据)

存储数据表单个字段的完整元数据,包括字段名、类型、约束、默认值等。

§PHP 对齐

PHP getFields 返回字段数组,每个元素包含:

  • name:字段名
  • type:字段类型(如 int(11) unsigned
  • notnull:是否 NOT NULL(注意 PHP 是“是否非空“,Rust 用 nullable 取反)
  • default:默认值
  • primary:是否主键
  • autoinc:是否自增

Rust 端额外扩展 unsigned(无符号)和 comment(字段注释)字段。

Fields§

§name: String

字段名

§data_type: String

字段数据类型(如 int(11), varchar(255), text, decimal(10,2)

§nullable: bool

是否允许 NULL(对齐 PHP notnull 取反:nullable = !notnull

§primary_key: bool

是否为主键(对齐 PHP primary

§auto_increment: bool

是否自增(对齐 PHP autoinc

§unsigned: bool

是否无符号(数值类型扩展字段,PHP 端从 type 字符串解析)

§default: Option<String>

默认值(None 表示无 DEFAULT 子句,Some(value) 表示有默认值)

§comment: Option<String>

字段注释(从 COMMENT 子句获取,PHP 端通常不缓存)

Implementations§

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impl ColumnDefinition

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pub fn new(name: impl Into<String>, data_type: impl Into<String>) -> Self

创建新的字段定义

默认值:可空、非主键、非自增、非无符号、无默认值、无注释。

§参数
  • name: 字段名
  • data_type: 字段数据类型
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pub fn nullable(self, nullable: bool) -> Self

设置是否允许 NULL(Builder 模式)

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pub fn primary_key(self, primary_key: bool) -> Self

设置是否为主键(Builder 模式)

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pub fn auto_increment(self, auto_increment: bool) -> Self

设置是否自增(Builder 模式)

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pub fn unsigned(self, unsigned: bool) -> Self

设置是否无符号(Builder 模式)

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pub fn default_value(self, default: impl Into<String>) -> Self

设置默认值(Builder 模式)

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pub fn comment(self, comment: impl Into<String>) -> Self

设置字段注释(Builder 模式)

Trait Implementations§

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impl Clone for ColumnDefinition

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fn clone(&self) -> ColumnDefinition

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for ColumnDefinition

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for ColumnDefinition

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Eq for ColumnDefinition

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impl PartialEq for ColumnDefinition

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

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more
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impl Serialize for ColumnDefinition

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

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for ColumnDefinition

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Gets the TypeId of self. Read more
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where T: ?Sized,

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Immutably borrows from an owned value. Read more
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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fn equivalent(&self, key: &K) -> bool

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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Returns the argument unchanged.

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Converts to this type from a reference to the input type.
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