forest-cli
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The Lumberjacks' toolbelt is the Forest CLI which makes easy to manage your back office application directly from the terminal.
393 lines • 40.1 kB
JavaScript
const { inject } = require('@forestadmin/context');
const P = require('bluebird');
const { plural, singular } = require('pluralize');
const ColumnTypeGetter = require('./sequelize-column-type-getter');
const DefaultValueExpression = require('./sequelize-default-value');
const TableConstraintsGetter = require('./sequelize-table-constraints-getter');
const EmptyDatabaseError = require('../../../../errors/database/empty-database-error');
const { isUnderscored } = require('../../../../utils/fields');
const ASSOCIATION_TYPE_BELONGS_TO = 'belongsTo';
const ASSOCIATION_TYPE_BELONGS_TO_MANY = 'belongsToMany';
const ASSOCIATION_TYPE_HAS_MANY = 'hasMany';
const ASSOCIATION_TYPE_HAS_ONE = 'hasOne';
const FOREIGN_KEY = 'FOREIGN KEY';
/** Queries database for default schema name */
async function getDefaultSchema(connection, userProvidedSchema) {
if (userProvidedSchema) {
return userProvidedSchema;
}
const dialect = connection.getDialect();
const queries = {
mssql: 'SELECT SCHEMA_NAME() AS default_schema',
mysql: 'SELECT DATABASE() AS default_schema',
mariadb: 'SELECT DATABASE() AS default_schema',
postgres: 'SELECT CURRENT_SCHEMA() AS default_schema',
};
if (queries[dialect]) {
const rows = await connection.query(queries[dialect], { type: connection.QueryTypes.SELECT });
return rows.length && rows[0].default_schema ? rows[0].default_schema : 'public';
}
return 'public';
}
/** Retrieve the description of the fields in a given table. */
async function analyzeFields(queryInterface, tableName, config) {
const dialect = queryInterface.sequelize.getDialect();
let columnsByName;
// Workaround bug in sequelize/dialects/mysql/query-generator#describe
// => Don't provide the schema when using mysql/mariadb
if (['mysql', 'mariadb'].includes(dialect)) {
columnsByName = await queryInterface.describeTable(tableName, {});
}
else {
columnsByName = await queryInterface.describeTable(tableName, { schema: config.dbSchema });
}
// Workaround bug in sequelize/dialects/(postgres|mssql)/query.js#run()
// => Fetch the unmodified default value from the information schema
if (dialect === 'postgres' || dialect === 'mssql') {
const getDefaultsQuery = `
SELECT column_name as colname, column_default as coldefault
FROM information_schema.columns
WHERE table_schema = ? AND table_name = ?
`;
const rows = await queryInterface.sequelize.query(getDefaultsQuery, {
type: queryInterface.sequelize.QueryTypes.SELECT,
replacements: [config.dbSchema, tableName],
});
rows.forEach(row => {
columnsByName[row.colname].defaultValue = row.coldefault;
});
}
Object.values(columnsByName).forEach(column => {
const defaultValue = new DefaultValueExpression(dialect, column.type, column.defaultValue);
// eslint-disable-next-line no-param-reassign
column.defaultValue = defaultValue.parse();
});
return columnsByName;
}
async function analyzePrimaryKeys(schema) {
return Object.keys(schema).filter(column => schema[column].primaryKey);
}
/** Retrieve table names from the provided schema. */
async function showAllTables(queryInterface, databaseConnection, schema) {
const dbDialect = databaseConnection.getDialect();
if (['mysql', 'mariadb'].includes(dbDialect)) {
return queryInterface.showAllTables();
}
const tables = await queryInterface.sequelize.query("SELECT table_name as table_name FROM INFORMATION_SCHEMA.TABLES WHERE table_schema = ? AND table_type LIKE '%TABLE' AND table_name != 'spatial_ref_sys'", { type: queryInterface.sequelize.QueryTypes.SELECT, replacements: [schema] });
return tables.map(table => table.table_name);
}
function hasTimestamps(fields) {
let hasCreatedAt = false;
let hasUpdatedAt = false;
fields.forEach(field => {
if (field.name === 'createdAt') {
hasCreatedAt = true;
}
if (field.name === 'updatedAt') {
hasUpdatedAt = true;
}
});
return hasCreatedAt && hasUpdatedAt;
}
function formatAliasName(columnName) {
const { assertPresent, lodash } = inject();
assertPresent({ lodash });
const alias = lodash.camelCase(columnName);
if (alias.endsWith('Id') && alias.length > 2) {
return alias.substring(0, alias.length - 2);
}
if (alias.endsWith('Uuid') && alias.length > 4) {
return alias.substring(0, alias.length - 4);
}
return alias;
}
// NOTICE: Look for the id column in both fields and primary keys.
function hasIdColumn(fields, primaryKeys) {
return (fields.some(field => field.name === 'id' || field.nameColumn === 'id') ||
primaryKeys?.includes('id'));
}
function isTechnicalTimestamp({ type, name }) {
// NOTICE: Ignore technical timestamp fields.
const FIELDS_TO_IGNORE = [
'createdAt',
'updatedAt',
'deletedAt',
'createDate',
'updateDate',
'deleteDate',
'creationDate',
'deletionDate',
];
return type === 'DATE' && FIELDS_TO_IGNORE.includes(name);
}
function isJunctionTable(fields, constraints) {
for (let index = 0; index < fields.length; index += 1) {
const field = fields[index];
// NOTICE: The only fields accepted are primary keys, technical timestamps and foreignKeys
if (!isTechnicalTimestamp(field) && !field.primaryKey) {
return false;
}
}
const foreignKeys = constraints.filter(constraint => constraint.foreignTableName && constraint.columnName && constraint.columnType === FOREIGN_KEY);
// NOTICE: To be a junction table it means you have 2 foreignKeys, no more no less
return foreignKeys.length === 2;
}
// NOTICE: Check the foreign key's reference unicity
function checkUnicity(primaryKeys, uniqueIndexes, columnName) {
const { assertPresent, lodash } = inject();
assertPresent({ lodash });
const isUnique = uniqueIndexes !== null &&
uniqueIndexes.find(indexColumnName => indexColumnName.length === 1 && indexColumnName.includes(columnName));
const isPrimary = lodash.isEqual([columnName], primaryKeys);
return isPrimary || isUnique;
}
function associationNameAlreadyExists(existingReferences, newReference) {
return existingReferences.some(reference => reference && reference.as === newReference.as);
}
function referenceAlreadyExists(existingReferences, newReference) {
return existingReferences.some(reference => reference &&
reference.ref === newReference.ref &&
reference.association === newReference.association &&
reference.foreignKey === newReference.foreignKey);
}
// NOTICE: Format the references depending on the type of the association
function createReference(tableName, existingsReferences, association, foreignKey, manyToManyForeignKey) {
const { assertPresent, lodash, strings } = inject();
assertPresent({ lodash, strings });
const foreignKeyName = lodash.camelCase(foreignKey.columnName);
const reference = {
foreignKey: foreignKey.columnName,
foreignKeyName: `${foreignKeyName}Key`,
association,
};
if (association === ASSOCIATION_TYPE_BELONGS_TO) {
reference.ref = foreignKey.foreignTableName;
reference.as = formatAliasName(foreignKey.columnName);
if (foreignKey.foreignColumnName !== 'id') {
reference.targetKey = foreignKey.foreignColumnName;
}
}
else if (association === ASSOCIATION_TYPE_BELONGS_TO_MANY) {
reference.ref = manyToManyForeignKey.foreignTableName;
reference.otherKey = manyToManyForeignKey.columnName;
reference.through = lodash.camelCase(strings.transformToSafeString(foreignKey.tableName));
reference.as = lodash.camelCase(plural(`${manyToManyForeignKey.foreignTableName}_through_${foreignKey.tableName}`));
}
else {
reference.ref = foreignKey.tableName;
const formater = association === ASSOCIATION_TYPE_HAS_MANY ? plural : singular;
const prefix = singular(tableName) === formatAliasName(foreignKeyName)
? ''
: `${formatAliasName(foreignKeyName)}_`;
if (foreignKey.foreignColumnName !== 'id') {
reference.sourceKey = foreignKey.foreignColumnName;
}
reference.as = lodash.camelCase(formater(`${prefix}${foreignKey.tableName}`));
}
if (referenceAlreadyExists(existingsReferences, reference))
return null;
if (associationNameAlreadyExists(existingsReferences, reference)) {
reference.as = lodash.camelCase(`${reference.as} ${reference.foreignKey}`);
}
return reference;
}
async function analyzeTable(queryInterface, tableConstraintsGetter, table, config) {
const schema = await analyzeFields(queryInterface, table, config);
return {
schema,
constraints: await tableConstraintsGetter.perform(table),
primaryKeys: await analyzePrimaryKeys(schema),
};
}
function createBelongsToReference(referenceTable, tableReferences, constraint) {
const referenceColumnName = constraint.foreignColumnName;
const referencePrimaryKeys = referenceTable.primaryKeys;
const referenceUniqueConstraint = referenceTable.constraints.find(({ columnType }) => ['UNIQUE', 'PRIMARY KEY'].includes(columnType));
const referenceUniqueIndexes = referenceUniqueConstraint
? referenceUniqueConstraint.uniqueIndexes
: null;
const isReferencePrimaryOrUnique = checkUnicity(referencePrimaryKeys, referenceUniqueIndexes, referenceColumnName);
if (isReferencePrimaryOrUnique) {
return createReference(null, tableReferences, ASSOCIATION_TYPE_BELONGS_TO, constraint);
}
return null;
}
// NOTICE: Use the foreign key and reference properties to determine the associations
// and push them as references of the table.
function createAllReferences(databaseSchema, schemaGenerated) {
const references = {};
Object.keys(databaseSchema).forEach(tableName => {
references[tableName] = [];
});
Object.keys(databaseSchema).forEach(tableName => {
const table = databaseSchema[tableName];
const { constraints, primaryKeys } = table;
const { isJunction } = schemaGenerated[tableName].options;
const foreignKeysWithExistingTable = constraints.filter(constraint => constraint.columnType === FOREIGN_KEY && databaseSchema[constraint.foreignTableName]);
foreignKeysWithExistingTable.forEach(constraint => {
const { columnName } = constraint;
const uniqueIndexes = constraint.uniqueIndexes || null;
const isPrimaryOrUnique = checkUnicity(primaryKeys, uniqueIndexes, columnName);
const referenceTableName = constraint.foreignTableName;
if (isJunction) {
const manyToManyKeys = foreignKeysWithExistingTable.filter(otherKey => otherKey.columnName !== constraint.columnName);
manyToManyKeys.forEach(manyToManyKey => {
references[referenceTableName].push(createReference(referenceTableName, references[referenceTableName], ASSOCIATION_TYPE_BELONGS_TO_MANY, constraint, manyToManyKey));
});
}
else {
references[referenceTableName].push(createReference(referenceTableName, references[referenceTableName], isPrimaryOrUnique ? ASSOCIATION_TYPE_HAS_ONE : ASSOCIATION_TYPE_HAS_MANY, constraint));
}
references[tableName].push(createBelongsToReference(databaseSchema[referenceTableName], references[tableName], constraint));
});
});
// remove null references
return Object.entries(references).reduce((accumulator, [tableName, tableReferences]) => {
accumulator[tableName] = tableReferences.filter(Boolean);
return accumulator;
}, {});
}
function isOnlyJoinTableWithId(schema, constraints) {
const idColumn = Object.keys(schema).find(columnName => columnName === 'id');
if (!idColumn)
return false;
const possibleForeignColumnNames = Object.keys(schema).filter(columnName => !isTechnicalTimestamp(schema[columnName]) && columnName !== 'id');
const columnWithoutForeignKey = possibleForeignColumnNames.find(columnName => !constraints.find(constraint => constraint.columnName === columnName && constraint.columnType === FOREIGN_KEY));
return !columnWithoutForeignKey;
}
async function createTableSchema(columnTypeGetter, { schema, constraints, primaryKeys }, tableName) {
const { assertPresent, lodash } = inject();
assertPresent({ lodash });
const fields = [];
await P.each(Object.keys(schema), async (columnName) => {
const columnInfo = schema[columnName];
const type = await columnTypeGetter.perform(columnInfo, columnName, tableName);
const foreignKey = constraints.find(constraint => constraint.columnName === columnName && constraint.columnType === FOREIGN_KEY);
const isValidField = type &&
(!foreignKey ||
!foreignKey.foreignTableName ||
!foreignKey.columnName ||
columnInfo.primaryKey);
// NOTICE: If the column is of integer type, named "id" and primary, Sequelize will handle it
// automatically without necessary declaration.
const isIdIntegerPrimaryColumn = columnName === 'id' && ['INTEGER', 'BIGINT'].includes(type) && columnInfo.primaryKey;
// NOTICE: But in some cases we want to force the id to be still generated.
// For example, Sequelize will not use a default id field on a model
// that has only foreign keys, so if the id primary key is present, we need to force it.
const forceIdColumn = isIdIntegerPrimaryColumn && isOnlyJoinTableWithId(schema, constraints);
if (isValidField && (!isIdIntegerPrimaryColumn || forceIdColumn)) {
// NOTICE: sequelize considers column name with parenthesis as raw Attributes
// do not try to camelCase the name for avoiding sequelize issues
const hasParenthesis = columnName.includes('(') || columnName.includes(')');
const name = hasParenthesis ? columnName : lodash.camelCase(columnName);
let isRequired = !columnInfo.allowNull;
if (isTechnicalTimestamp({ name, type })) {
isRequired = false;
}
const field = {
name,
nameColumn: columnName,
type,
primaryKey: columnInfo.primaryKey,
defaultValue: columnInfo.defaultValue,
isRequired,
};
fields.push(field);
}
});
const options = {
underscored: isUnderscored(fields),
timestamps: hasTimestamps(fields),
hasIdColumn: hasIdColumn(fields, primaryKeys),
hasPrimaryKeys: Boolean(primaryKeys?.length),
isJunction: isJunctionTable(fields, constraints),
};
return {
fields,
primaryKeys,
options,
};
}
// NOTICE: This detects two generated fields (regular or reference's alias) with the same name
// and rename reference's alias as `Linked${collectionReferenced}` to prevent Sequelize
// from crashing at startup.
function fixAliasConflicts(wholeSchema) {
const { assertPresent, lodash } = inject();
assertPresent({ lodash });
const tablesName = Object.keys(wholeSchema);
if (!tablesName.length) {
return;
}
tablesName.forEach(tableName => {
const table = wholeSchema[tableName];
if (table.references.length && table.fields.length) {
const fieldNames = table.fields.map(field => field.name);
table.references.forEach((reference, index) => {
if (fieldNames.includes(reference.as)) {
table.references[index].as = `linked${lodash.upperFirst(reference.as)}`;
}
});
}
});
}
async function analyzeSequelizeTables(connection, config, allowWarning) {
const { assertPresent, lodash } = inject();
assertPresent({ lodash });
// User provided a schema, check if it exists
if (config.dbSchema) {
const schemas = await connection.query('SELECT SCHEMA_NAME FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME = ?;', { type: connection.QueryTypes.SELECT, replacements: [config.dbSchema] });
if (!schemas.length) {
const message = 'This schema does not exists.';
return inject().terminator.terminate(1, {
errorCode: 'database_authentication_error',
errorMessage: message,
logs: [message],
});
}
}
// If dbSchema was not provided by user, get default one.
const configWithSchema = {
...config,
dbSchema: await getDefaultSchema(connection, config.dbSchema),
};
// Build the db schema.
const schemaAllTables = {};
const queryInterface = connection.getQueryInterface();
const databaseSchema = {};
const tableNames = await showAllTables(queryInterface, connection, configWithSchema.dbSchema);
const constraintsGetter = new TableConstraintsGetter(connection, configWithSchema.dbSchema);
await P.each(tableNames, async (tableName) => {
const { schema, constraints, primaryKeys } = await analyzeTable(queryInterface, constraintsGetter, tableName, configWithSchema);
databaseSchema[tableName] = {
schema,
constraints,
primaryKeys,
references: [],
};
});
const columnTypeGetter = new ColumnTypeGetter(connection, configWithSchema.dbSchema, allowWarning);
await P.each(tableNames, async (tableName) => {
schemaAllTables[tableName] = await createTableSchema(columnTypeGetter, databaseSchema[tableName], tableName);
});
// NOTICE: Fill the references field for each table schema
const referencesPerTable = createAllReferences(databaseSchema, schemaAllTables);
Object.keys(referencesPerTable).forEach(tableName => {
schemaAllTables[tableName].references = lodash.sortBy(referencesPerTable[tableName], 'association');
// NOTE: When a table contains no field, it will be considered camelCased
// by default, so we need to check its references to ensure whether
// it is camelCased or not.
if (!schemaAllTables[tableName].fields.length) {
schemaAllTables[tableName].options.underscored = isUnderscored(schemaAllTables[tableName].references.map(({ foreignKey }) => ({ nameColumn: foreignKey })));
}
});
if (Object.keys(schemaAllTables).length === 0) {
throw new EmptyDatabaseError('no tables found', {
orm: 'sequelize',
dialect: connection.getDialect(),
});
}
fixAliasConflicts(schemaAllTables);
return schemaAllTables;
}
module.exports = analyzeSequelizeTables;
//# 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