Struct mentat_db::AttributeBuilder

[+] Show type declaration

pub struct AttributeBuilder {
    pub value_type: Option<ValueType>,
    pub multival: Option<bool>,
    pub unique: Option<Option<Unique>>,
    pub index: Option<bool>,
    pub fulltext: Option<bool>,
    pub component: Option<bool>,
    pub no_history: Option<bool>,
    // some fields omitted
}

Fields

value_type: Option<ValueType>

multival: Option<bool>

unique: Option<Option<Unique>>

index: Option<bool>

fulltext: Option<bool>

component: Option<bool>

no_history: Option<bool>

Methods

impl AttributeBuilder

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pub fn helpful() -> Self

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Make a new AttributeBuilder for human consumption: it will help you by flipping relevant flags.

pub fn to_modify_attribute(attribute: &Attribute) -> Self

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Make a new AttributeBuilder from an existing Attribute. This is important to allow retraction. Only attributes that we allow to change are duplicated here.

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

pub fn value_type<'a>(&'a mut self, value_type: ValueType) -> &'a mut Self

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

pub fn multival<'a>(&'a mut self, multival: bool) -> &'a mut Self

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

pub fn non_unique<'a>(&'a mut self) -> &'a mut Self

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

pub fn unique<'a>(&'a mut self, unique: Unique) -> &'a mut Self

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

pub fn index<'a>(&'a mut self, index: bool) -> &'a mut Self

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

pub fn fulltext<'a>(&'a mut self, fulltext: bool) -> &'a mut Self

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

pub fn component<'a>(&'a mut self, component: bool) -> &'a mut Self

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

pub fn no_history<'a>(&'a mut self, no_history: bool) -> &'a mut Self

pub fn validate_install_attribute(&self) -> Result<()>

pub fn validate_alter_attribute(&self) -> Result<()>

pub fn build(&self) -> Attribute

Important traits for Vec<u8>

impl Write for Vec<u8>

pub fn mutate(&self, attribute: &mut Attribute) -> Vec<AttributeAlteration>

Trait Implementations

impl Clone for AttributeBuilder

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fn clone(&self) -> AttributeBuilder

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Returns a copy of the value.

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

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Performs copy-assignment from source.

impl Debug for AttributeBuilder

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fn fmt(&self, __arg_0: &mut Formatter) -> Result

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Formats the value using the given formatter.

impl Default for AttributeBuilder

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fn default() -> AttributeBuilder

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Returns the "default value" for a type.

impl Eq for AttributeBuilder

impl Hash for AttributeBuilder

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fn hash<__H: Hasher>(&self, __arg_0: &mut __H)

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Feeds this value into the given [Hasher].

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

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Feeds a slice of this type into the given [Hasher].

impl Ord for AttributeBuilder

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fn cmp(&self, __arg_0: &AttributeBuilder) -> Ordering

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This method returns an Ordering between self and other.

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

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Compares and returns the maximum of two values.

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

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Compares and returns the minimum of two values.

impl PartialOrd for AttributeBuilder

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fn partial_cmp(&self, __arg_0: &AttributeBuilder) -> Option<Ordering>

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

fn lt(&self, __arg_0: &AttributeBuilder) -> bool

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This method tests less than (for self and other) and is used by the < operator.

fn le(&self, __arg_0: &AttributeBuilder) -> bool

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

fn gt(&self, __arg_0: &AttributeBuilder) -> bool

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This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, __arg_0: &AttributeBuilder) -> bool

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

impl PartialEq for AttributeBuilder

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fn eq(&self, __arg_0: &AttributeBuilder) -> bool

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This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &AttributeBuilder) -> bool

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This method tests for !=.