Enum SeedError 

#[non_exhaustive]
pub enum SeedError {
    CyclicForeignKeys {
        tables: Vec<String>,
    },
    MissingParentRows {
        child: String,
        parent: String,
    },
    UnsafeResetSelection {
        parent: String,
        skipped_child: String,
    },
    ParameterLimitTooLow {
        table: String,
        required: usize,
        limit: usize,
    },
    UnknownTable {
        table: String,
        known: Vec<String>,
    },
    AmbiguousTable {
        table: String,
        candidates: Vec<String>,
    },
    UnknownColumn {
        table: String,
        column: String,
        known: Vec<String>,
    },
    NotRelated {
        parent: String,
        child: String,
    },
    DialectNotEnabled {
        dialect: String,
    },
    NoLiteral {
        reason: String,
    },
    InvalidValue {
        table: String,
        column: String,
        reason: String,
    },
}

Why SeedConfig could not build the statements (returned by try_generate and reset_plan).

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

CyclicForeignKeys

The non-skipped tables have a foreign-key cycle, so there is no parent-first order. A self-reference counts only when all of its columns are NOT NULL.

Fields

tables: Vec<String>

MissingParentRows

A NOT NULL foreign key in child has no parent row to point at: the seeded parent got zero rows, or the relation count is zero. (A nullable foreign key is set to NULL instead.)

Fields

child: String

parent: String

UnsafeResetSelection

reset_plan would delete a parent’s rows while a skipped table still references it.

Fields

parent: String

The table that would be emptied.

skipped_child: String

The skipped table that references it.

ParameterLimitTooLow

A single row needs more bind parameters than the limit (max_params, or the dialect’s maximum).

Fields

table: String

The table being seeded.

required: usize

Parameters one row needs.

limit: usize

The configured limit.

UnknownTable

A *_by_name setting names a table the schema does not have.

Fields

table: String

The name as given.

known: Vec<String>

The schema’s tables.

AmbiguousTable

A *_by_name setting names a table that exists in several namespaces; qualify it as schema.table.

Fields

table: String

The name as given.

candidates: Vec<String>

The matching tables.

UnknownColumn

A *_by_name setting names a column the table does not have.

Fields

table: String

The table.

column: String

The column name as given.

known: Vec<String>

The table’s columns.

NotRelated

relation_by_name was given a child with no foreign key to parent.

Fields

parent: String

The parent table.

child: String

The child table.

DialectNotEnabled

Schema::from_snapshot was given a snapshot for a dialect whose feature (sqlite, postgres or mysql) is off.

Fields

dialect: String

The snapshot’s dialect.

NoLiteral

A value has no SQL literal form, so the statement cannot be written with its values inline (inline_sql, try_generate_script).

Fields

reason: String

What is wrong with the value.

InvalidValue

A generated value cannot be stored in the column’s SQL type.

Fields

table: String

The table being seeded.

column: String

The column.

reason: String

What is wrong with the value.

Trait Implementations

impl Clone for SeedError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SeedError

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

Formats the value using the given formatter.

impl Display for SeedError

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

Formats the value using the given formatter.

impl Eq for SeedError

impl Error for SeedError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for SeedError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SeedError