surrealdb/sql/statements/define/
field.rs

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use crate::ctx::Context;
use crate::dbs::{Options, Transaction};
use crate::doc::CursorDoc;
use crate::err::Error;
use crate::iam::{Action, ResourceKind};
use crate::sql::{
	fmt::is_pretty, fmt::pretty_indent, Base, Ident, Idiom, Kind, Permissions, Strand, Value,
};
use derive::Store;
use revision::revisioned;
use serde::{Deserialize, Serialize};
use std::fmt::{self, Display, Write};

#[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Store, Hash)]
#[revisioned(revision = 1)]
pub struct DefineFieldStatement {
	pub name: Idiom,
	pub what: Ident,
	pub flex: bool,
	pub kind: Option<Kind>,
	pub value: Option<Value>,
	pub assert: Option<Value>,
	pub default: Option<Value>,
	pub permissions: Permissions,
	pub comment: Option<Strand>,
}

impl DefineFieldStatement {
	/// Process this type returning a computed simple Value
	pub(crate) async fn compute(
		&self,
		_ctx: &Context<'_>,
		opt: &Options,
		txn: &Transaction,
		_doc: Option<&CursorDoc<'_>>,
	) -> Result<Value, Error> {
		// Allowed to run?
		opt.is_allowed(Action::Edit, ResourceKind::Field, &Base::Db)?;
		// Claim transaction
		let mut run = txn.lock().await;
		// Clear the cache
		run.clear_cache();
		// Process the statement
		let fd = self.name.to_string();
		let key = crate::key::table::fd::new(opt.ns(), opt.db(), &self.what, &fd);
		run.add_ns(opt.ns(), opt.strict).await?;
		run.add_db(opt.ns(), opt.db(), opt.strict).await?;
		run.add_tb(opt.ns(), opt.db(), &self.what, opt.strict).await?;
		run.set(key, self).await?;
		// Clear the cache
		let key = crate::key::table::fd::prefix(opt.ns(), opt.db(), &self.what);
		run.clr(key).await?;
		// Ok all good
		Ok(Value::None)
	}
}

impl Display for DefineFieldStatement {
	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
		write!(f, "DEFINE FIELD {} ON {}", self.name, self.what)?;
		if self.flex {
			write!(f, " FLEXIBLE")?
		}
		if let Some(ref v) = self.kind {
			write!(f, " TYPE {v}")?
		}
		if let Some(ref v) = self.default {
			write!(f, " DEFAULT {v}")?
		}
		if let Some(ref v) = self.value {
			write!(f, " VALUE {v}")?
		}
		if let Some(ref v) = self.assert {
			write!(f, " ASSERT {v}")?
		}
		if let Some(ref v) = self.comment {
			write!(f, " COMMENT {v}")?
		}
		if !self.permissions.is_full() {
			let _indent = if is_pretty() {
				Some(pretty_indent())
			} else {
				f.write_char(' ')?;
				None
			};
			write!(f, "{}", self.permissions)?;
		}
		Ok(())
	}
}