typeorm
Version:
Data-Mapper ORM for TypeScript, ES7, ES6, ES5. Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, MongoDB databases.
338 lines (336 loc) • 18.8 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var OrmUtils_1 = require("../../util/OrmUtils");
var EntityMetadata_1 = require("../../metadata/EntityMetadata");
var StringUtils_1 = require("../../util/StringUtils");
var OracleDriver_1 = require("../../driver/oracle/OracleDriver");
/**
* Transforms raw sql results returned from the database into entity object.
* Entity is constructed based on its entity metadata.
*/
var RawSqlResultsToEntityTransformer = /** @class */ (function () {
// -------------------------------------------------------------------------
// Constructor
// -------------------------------------------------------------------------
function RawSqlResultsToEntityTransformer(expressionMap, driver, rawRelationIdResults, rawRelationCountResults, queryRunner) {
this.expressionMap = expressionMap;
this.driver = driver;
this.rawRelationIdResults = rawRelationIdResults;
this.rawRelationCountResults = rawRelationCountResults;
this.queryRunner = queryRunner;
}
// -------------------------------------------------------------------------
// Public Methods
// -------------------------------------------------------------------------
/**
* Since db returns a duplicated rows of the data where accuracies of the same object can be duplicated
* we need to group our result and we must have some unique id (primary key in our case)
*/
RawSqlResultsToEntityTransformer.prototype.transform = function (rawResults, alias) {
var _this = this;
var group = this.group(rawResults, alias);
var entities = [];
group.forEach(function (results) {
var entity = _this.transformRawResultsGroup(results, alias);
if (entity !== undefined)
entities.push(entity);
});
return entities;
};
// -------------------------------------------------------------------------
// Protected Methods
// -------------------------------------------------------------------------
/**
* Groups given raw results by ids of given alias.
*/
RawSqlResultsToEntityTransformer.prototype.group = function (rawResults, alias) {
var _this = this;
var map = new Map();
var keys = alias.metadata.primaryColumns.map(function (column) { return _this.buildColumnAlias(alias.name, column.databaseName); });
rawResults.forEach(function (rawResult) {
var id = keys.map(function (key) { return rawResult[key]; }).join("_"); // todo: check partial
if (!id)
return;
var items = map.get(id);
if (!items) {
map.set(id, [rawResult]);
}
else {
items.push(rawResult);
}
});
return map;
};
/**
* Transforms set of data results into single entity.
*/
RawSqlResultsToEntityTransformer.prototype.transformRawResultsGroup = function (rawResults, alias) {
var _this = this;
// let hasColumns = false; // , hasEmbeddedColumns = false, hasParentColumns = false, hasParentEmbeddedColumns = false;
var metadata = alias.metadata;
if (metadata.discriminatorColumn) {
var discriminatorValues_1 = rawResults.map(function (result) { return result[_this.buildColumnAlias(alias.name, alias.metadata.discriminatorColumn.databaseName)]; });
var discriminatorMetadata = metadata.childEntityMetadatas.find(function (childEntityMetadata) {
return !!discriminatorValues_1.find(function (value) { return value === childEntityMetadata.discriminatorValue; });
});
if (discriminatorMetadata)
metadata = discriminatorMetadata;
}
var entity = this.expressionMap.options.indexOf("create-pojo") !== -1 ? {} : metadata.create(this.queryRunner);
// get value from columns selections and put them into newly created entity
var hasColumns = this.transformColumns(rawResults, alias, entity, metadata);
var hasRelations = this.transformJoins(rawResults, entity, alias, metadata);
var hasRelationIds = this.transformRelationIds(rawResults, alias, entity, metadata);
var hasRelationCounts = this.transformRelationCounts(rawResults, alias, entity);
// if we have at least one selected column then return this entity
// since entity must have at least primary columns to be really selected and transformed into entity
if (hasColumns)
return entity;
// if we don't have any selected column we should not return entity,
// except for the case when entity only contain a primary column as a relation to another entity
// in this case its absolutely possible our entity to not have any columns except a single relation
var hasOnlyVirtualPrimaryColumns = metadata.primaryColumns.filter(function (column) { return column.isVirtual === false; }).length === 0; // todo: create metadata.hasOnlyVirtualPrimaryColumns
if (hasOnlyVirtualPrimaryColumns && (hasRelations || hasRelationIds || hasRelationCounts))
return entity;
return undefined;
};
// get value from columns selections and put them into object
RawSqlResultsToEntityTransformer.prototype.transformColumns = function (rawResults, alias, entity, metadata) {
var _this = this;
var hasData = false;
metadata.columns.forEach(function (column) {
// if table inheritance is used make sure this column is not child's column
if (metadata.childEntityMetadatas.length > 0 && metadata.childEntityMetadatas.map(function (metadata) { return metadata.target; }).indexOf(column.target) !== -1)
return;
var value = rawResults[0][_this.buildColumnAlias(alias.name, column.databaseName)];
if (value === undefined || column.isVirtual)
return;
// if user does not selected the whole entity or he used partial selection and does not select this particular column
// then we don't add this column and its value into the entity
if (!_this.expressionMap.selects.find(function (select) { return select.selection === alias.name || select.selection === alias.name + "." + column.propertyPath; }))
return;
column.setEntityValue(entity, _this.driver.prepareHydratedValue(value, column));
if (value !== null) // we don't mark it as has data because if we will have all nulls in our object - we don't need such object
hasData = true;
});
return hasData;
};
/**
* Transforms joined entities in the given raw results by a given alias and stores to the given (parent) entity
*/
RawSqlResultsToEntityTransformer.prototype.transformJoins = function (rawResults, entity, alias, metadata) {
var _this = this;
var hasData = false;
// let discriminatorValue: string = "";
// if (metadata.discriminatorColumn)
// discriminatorValue = rawResults[0][this.buildColumnAlias(alias.name, alias.metadata.discriminatorColumn!.databaseName)];
this.expressionMap.joinAttributes.forEach(function (join) {
// skip joins without metadata
if (!join.metadata)
return;
// if simple left or inner join was performed without selection then we don't need to do anything
if (!join.isSelected)
return;
// this check need to avoid setting properties than not belong to entity when single table inheritance used. (todo: check if we still need it)
// const metadata = metadata.childEntityMetadatas.find(childEntityMetadata => discriminatorValue === childEntityMetadata.discriminatorValue);
if (join.relation && !metadata.relations.find(function (relation) { return relation === join.relation; }))
return;
// some checks to make sure this join is for current alias
if (join.mapToProperty) {
if (join.mapToPropertyParentAlias !== alias.name)
return;
}
else {
if (!join.relation || join.parentAlias !== alias.name || join.relationPropertyPath !== join.relation.propertyPath)
return;
}
// transform joined data into entities
var result = _this.transform(rawResults, join.alias);
result = !join.isMany ? result[0] : result;
result = !join.isMany && result === undefined ? null : result; // this is needed to make relations to return null when its joined but nothing was found in the database
if (result === undefined) // if nothing was joined then simply return
return;
// if join was mapped to some property then save result to that property
if (join.mapToPropertyPropertyName) {
entity[join.mapToPropertyPropertyName] = result; // todo: fix embeds
}
else { // otherwise set to relation
join.relation.setEntityValue(entity, result);
}
hasData = true;
});
return hasData;
};
RawSqlResultsToEntityTransformer.prototype.transformRelationIds = function (rawSqlResults, alias, entity, metadata) {
var _this = this;
var hasData = false;
this.rawRelationIdResults.forEach(function (rawRelationIdResult) {
if (rawRelationIdResult.relationIdAttribute.parentAlias !== alias.name)
return;
var relation = rawRelationIdResult.relationIdAttribute.relation;
var valueMap = _this.createValueMapFromJoinColumns(relation, rawRelationIdResult.relationIdAttribute.parentAlias, rawSqlResults);
if (valueMap === undefined || valueMap === null)
return;
var idMaps = rawRelationIdResult.results.map(function (result) {
var entityPrimaryIds = _this.extractEntityPrimaryIds(relation, result);
if (EntityMetadata_1.EntityMetadata.compareIds(entityPrimaryIds, valueMap) === false)
return;
var columns;
if (relation.isManyToOne || relation.isOneToOneOwner) {
columns = relation.joinColumns.map(function (joinColumn) { return joinColumn; });
}
else if (relation.isOneToMany || relation.isOneToOneNotOwner) {
columns = relation.inverseEntityMetadata.primaryColumns.map(function (joinColumn) { return joinColumn; });
// columns = relation.inverseRelation!.joinColumns.map(joinColumn => joinColumn.referencedColumn!); //.inverseEntityMetadata.primaryColumns.map(joinColumn => joinColumn);
}
else { // ManyToMany
if (relation.isOwning) {
columns = relation.inverseJoinColumns.map(function (joinColumn) { return joinColumn; });
}
else {
columns = relation.inverseRelation.joinColumns.map(function (joinColumn) { return joinColumn; });
}
}
var idMap = columns.reduce(function (idMap, column) {
var value = result[column.databaseName];
if (relation.isOneToMany || relation.isOneToOneNotOwner) {
if (column.referencedColumn) // if column is a relation
value = column.referencedColumn.createValueMap(value);
return OrmUtils_1.OrmUtils.mergeDeep(idMap, column.createValueMap(value));
}
else {
if (column.referencedColumn.referencedColumn) // if column is a relation
value = column.referencedColumn.referencedColumn.createValueMap(value);
return OrmUtils_1.OrmUtils.mergeDeep(idMap, column.referencedColumn.createValueMap(value));
}
}, {});
if (columns.length === 1 && rawRelationIdResult.relationIdAttribute.disableMixedMap === false) {
if (relation.isOneToMany || relation.isOneToOneNotOwner) {
return columns[0].getEntityValue(idMap);
}
else {
return columns[0].referencedColumn.getEntityValue(idMap);
}
}
return idMap;
}).filter(function (result) { return result; });
var properties = rawRelationIdResult.relationIdAttribute.mapToPropertyPropertyPath.split(".");
var mapToProperty = function (properties, map, value) {
var property = properties.shift();
if (property && properties.length === 0) {
map[property] = value;
return map;
}
else if (property && properties.length > 0) {
mapToProperty(properties, map[property], value);
}
else {
return map;
}
};
if (relation.isOneToOne || relation.isManyToOne) {
if (idMaps[0] !== undefined) {
mapToProperty(properties, entity, idMaps[0]);
hasData = true;
}
}
else {
mapToProperty(properties, entity, idMaps);
if (idMaps.length > 0) {
hasData = true;
}
}
});
return hasData;
};
RawSqlResultsToEntityTransformer.prototype.transformRelationCounts = function (rawSqlResults, alias, entity) {
var _this = this;
var hasData = false;
this.rawRelationCountResults
.filter(function (rawRelationCountResult) { return rawRelationCountResult.relationCountAttribute.parentAlias === alias.name; })
.forEach(function (rawRelationCountResult) {
var relation = rawRelationCountResult.relationCountAttribute.relation;
var referenceColumnName;
if (relation.isOneToMany) {
referenceColumnName = relation.inverseRelation.joinColumns[0].referencedColumn.databaseName; // todo: fix joinColumns[0]
}
else {
referenceColumnName = relation.isOwning ? relation.joinColumns[0].referencedColumn.databaseName : relation.inverseRelation.joinColumns[0].referencedColumn.databaseName;
}
var referenceColumnValue = rawSqlResults[0][_this.buildColumnAlias(alias.name, referenceColumnName)]; // we use zero index since its grouped data // todo: selection with alias for entity columns wont work
if (referenceColumnValue !== undefined && referenceColumnValue !== null) {
entity[rawRelationCountResult.relationCountAttribute.mapToPropertyPropertyName] = 0;
rawRelationCountResult.results
.filter(function (result) { return result["parentId"] === referenceColumnValue; })
.forEach(function (result) {
entity[rawRelationCountResult.relationCountAttribute.mapToPropertyPropertyName] = parseInt(result["cnt"]);
hasData = true;
});
}
});
return hasData;
};
/**
* Builds column alias from given alias name and column name,
* If alias length is more than 29, abbreviates column name.
*/
RawSqlResultsToEntityTransformer.prototype.buildColumnAlias = function (aliasName, columnName) {
var columnAliasName = aliasName + "_" + columnName;
if (columnAliasName.length > 29 && this.driver instanceof OracleDriver_1.OracleDriver)
return aliasName + "_" + StringUtils_1.abbreviate(columnName, 2);
return columnAliasName;
};
RawSqlResultsToEntityTransformer.prototype.createValueMapFromJoinColumns = function (relation, parentAlias, rawSqlResults) {
var _this = this;
var columns;
if (relation.isManyToOne || relation.isOneToOneOwner) {
columns = relation.entityMetadata.primaryColumns.map(function (joinColumn) { return joinColumn; });
}
else if (relation.isOneToMany || relation.isOneToOneNotOwner) {
columns = relation.inverseRelation.joinColumns.map(function (joinColumn) { return joinColumn; });
}
else {
if (relation.isOwning) {
columns = relation.joinColumns.map(function (joinColumn) { return joinColumn; });
}
else {
columns = relation.inverseRelation.inverseJoinColumns.map(function (joinColumn) { return joinColumn; });
}
}
return columns.reduce(function (valueMap, column) {
rawSqlResults.forEach(function (rawSqlResult) {
if (relation.isManyToOne || relation.isOneToOneOwner) {
valueMap[column.databaseName] = rawSqlResult[_this.buildColumnAlias(parentAlias, column.databaseName)];
}
else {
valueMap[column.databaseName] = rawSqlResult[_this.buildColumnAlias(parentAlias, column.referencedColumn.databaseName)];
}
});
return valueMap;
}, {});
};
RawSqlResultsToEntityTransformer.prototype.extractEntityPrimaryIds = function (relation, relationIdRawResult) {
var columns;
if (relation.isManyToOne || relation.isOneToOneOwner) {
columns = relation.entityMetadata.primaryColumns.map(function (joinColumn) { return joinColumn; });
}
else if (relation.isOneToMany || relation.isOneToOneNotOwner) {
columns = relation.inverseRelation.joinColumns.map(function (joinColumn) { return joinColumn; });
}
else {
if (relation.isOwning) {
columns = relation.joinColumns.map(function (joinColumn) { return joinColumn; });
}
else {
columns = relation.inverseRelation.inverseJoinColumns.map(function (joinColumn) { return joinColumn; });
}
}
return columns.reduce(function (data, column) {
data[column.databaseName] = relationIdRawResult[column.databaseName];
return data;
}, {});
};
return RawSqlResultsToEntityTransformer;
}());
exports.RawSqlResultsToEntityTransformer = RawSqlResultsToEntityTransformer;
//# sourceMappingURL=RawSqlResultsToEntityTransformer.js.map