pub struct FieldBuilder { /* private fields */ }

Implementations§

Make the field optional.

Specify an expression to use to populate the new column in existing rows. This is must be specified (only) for non-opt fields in a new version of an existing table.

Use a custom Rust type for this field. This must be the full path to the type, like crate::abcdef::MyType.

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Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Should always be Self
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.