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115 lines
2.6 KiB
115 lines
2.6 KiB
//! Data model structs and enums
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use std::fmt::{Display, Formatter};
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use std::fmt;
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use serde::{Deserialize, Serialize};
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use super::data::TypedValue;
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use super::ID;
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use crate::id::HaveId;
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/// Get a description of a struct
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pub trait Describe {
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/// Short but informative description for error messages
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fn describe(&self) -> String;
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}
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/// Object template
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct ObjectModel {
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/// PK
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#[serde(default)]
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pub id: ID,
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/// Template name, unique within the database
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pub name: String,
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}
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/// Relation between templates
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct RelationModel {
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/// PK
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#[serde(default)]
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pub id: ID,
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/// Object template ID
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pub object: ID,
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/// Relation name, unique within the parent object
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pub name: String,
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/// Relation name when viewed from the other side, unique within the related object's relations
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pub reciprocal_name: String,
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/// Relation is optional
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pub optional: bool,
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/// Relation can be multiple
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pub multiple: bool,
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/// Related object template ID
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pub related: ID,
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}
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/// Property definition
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct PropertyModel {
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/// PK
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#[serde(default)]
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pub id: ID,
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/// Object or Reference template ID
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pub object: ID,
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/// Property name, unique within the parent object or reference
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pub name: String,
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/// Property is optional
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pub optional: bool,
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/// Property can be multiple
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pub multiple: bool,
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/// Property data type
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pub data_type: DataType,
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/// Default value, used for newly created objects
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pub default: Option<TypedValue>,
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}
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/// Value data type
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#[derive(Debug, Clone, Copy, Serialize, Deserialize, Eq, PartialEq)]
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pub enum DataType {
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/// Text
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String,
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/// Integer
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Integer,
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/// Floating point number
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Decimal,
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/// Boolean yes/no
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Boolean,
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}
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impl Display for ObjectModel {
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fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
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write!(f, "object \"{}\" ({})", self.name, self.id)
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}
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}
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impl Display for RelationModel {
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fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
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write!(f, "relation \"{}\" ({})", self.name, self.id)
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}
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}
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impl Display for PropertyModel {
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fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
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write!(f, "property \"{}\" ({})", self.name, self.id)
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}
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}
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impl HaveId for ObjectModel {
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fn get_id(&self) -> ID {
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self.id
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}
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}
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impl HaveId for RelationModel {
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fn get_id(&self) -> ID {
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self.id
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}
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}
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impl HaveId for PropertyModel {
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fn get_id(&self) -> ID {
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self.id
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}
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}
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