Change endpoint from persons to people

backend/apis/nodejs/node_modules/knex/lib/execution/batch-insert.js

@@ -0,0 +1,51 @@
+const chunk = require('lodash/chunk');
+const flatten = require('lodash/flatten');
+const delay = require('./internal/delay');
+const { isNumber } = require('../util/is');
+
+function batchInsert(client, tableName, batch, chunkSize = 1000) {
+  let returning = undefined;
+  let transaction = null;
+  if (!isNumber(chunkSize) || chunkSize < 1) {
+    throw new TypeError(`Invalid chunkSize: ${chunkSize}`);
+  }
+  if (!Array.isArray(batch)) {
+    throw new TypeError(`Invalid batch: Expected array, got ${typeof batch}`);
+  }
+  const chunks = chunk(batch, chunkSize);
+
+  const runInTransaction = (cb) => {
+    if (transaction) {
+      return cb(transaction);
+    }
+    return client.transaction(cb);
+  };
+
+  return Object.assign(
+    Promise.resolve().then(async () => {
+      //Next tick to ensure wrapper functions are called if needed
+      await delay(1);
+      return runInTransaction(async (tr) => {
+        const chunksResults = [];
+        for (const items of chunks) {
+          chunksResults.push(await tr(tableName).insert(items, returning));
+        }
+        return flatten(chunksResults);
+      });
+    }),
+    {
+      returning(columns) {
+        returning = columns;
+
+        return this;
+      },
+      transacting(tr) {
+        transaction = tr;
+
+        return this;
+      },
+    }
+  );
+}
+
+module.exports = batchInsert;

backend/apis/nodejs/node_modules/knex/lib/execution/internal/delay.js

@@ -0,0 +1,6 @@
+/**
+ * @param {number} delay
+ * @returns {Promise<void>}
+ */
+module.exports = (delay) =>
+  new Promise((resolve) => setTimeout(resolve, delay));

backend/apis/nodejs/node_modules/knex/lib/execution/internal/ensure-connection-callback.js

@@ -0,0 +1,41 @@
+function ensureConnectionCallback(runner) {
+  runner.client.emit('start', runner.builder);
+  runner.builder.emit('start', runner.builder);
+  const sql = runner.builder.toSQL();
+
+  if (runner.builder._debug) {
+    runner.client.logger.debug(sql);
+  }
+
+  if (Array.isArray(sql)) {
+    return runner.queryArray(sql);
+  }
+  return runner.query(sql);
+}
+
+function ensureConnectionStreamCallback(runner, params) {
+  try {
+    const sql = runner.builder.toSQL();
+
+    if (Array.isArray(sql) && params.hasHandler) {
+      throw new Error(
+        'The stream may only be used with a single query statement.'
+      );
+    }
+
+    return runner.client.stream(
+      runner.connection,
+      sql,
+      params.stream,
+      params.options
+    );
+  } catch (e) {
+    params.stream.emit('error', e);
+    throw e;
+  }
+}
+
+module.exports = {
+  ensureConnectionCallback,
+  ensureConnectionStreamCallback,
+};

backend/apis/nodejs/node_modules/knex/lib/execution/internal/query-executioner.js

@@ -0,0 +1,62 @@
+const _debugQuery = require('debug')('knex:query');
+const debugBindings = require('debug')('knex:bindings');
+const debugQuery = (sql, txId) => _debugQuery(sql.replace(/%/g, '%%'), txId);
+const { isString } = require('../../util/is');
+
+function formatQuery(sql, bindings, timeZone, client) {
+  bindings = bindings == null ? [] : [].concat(bindings);
+  let index = 0;
+  return sql.replace(/\\?\?/g, (match) => {
+    if (match === '\\?') {
+      return '?';
+    }
+    if (index === bindings.length) {
+      return match;
+    }
+    const value = bindings[index++];
+    return client._escapeBinding(value, { timeZone });
+  });
+}
+
+function enrichQueryObject(connection, queryParam, client) {
+  const queryObject = isString(queryParam) ? { sql: queryParam } : queryParam;
+
+  queryObject.bindings = client.prepBindings(queryObject.bindings);
+  queryObject.sql = client.positionBindings(queryObject.sql);
+
+  const { __knexUid, __knexTxId } = connection;
+
+  client.emit('query', Object.assign({ __knexUid, __knexTxId }, queryObject));
+  debugQuery(queryObject.sql, __knexTxId);
+  debugBindings(queryObject.bindings, __knexTxId);
+
+  return queryObject;
+}
+
+function executeQuery(connection, queryObject, client) {
+  return client._query(connection, queryObject).catch((err) => {
+    if (client.config && client.config.compileSqlOnError === false) {
+      err.message = queryObject.sql + ' - ' + err.message;
+    } else {
+      err.message =
+        formatQuery(queryObject.sql, queryObject.bindings, undefined, client) +
+        ' - ' +
+        err.message;
+    }
+    client.emit(
+      'query-error',
+      err,
+      Object.assign(
+        { __knexUid: connection.__knexUid, __knexTxId: connection.__knexUid },
+        queryObject
+      )
+    );
+    throw err;
+  });
+}
+
+module.exports = {
+  enrichQueryObject,
+  executeQuery,
+  formatQuery,
+};

backend/apis/nodejs/node_modules/knex/lib/execution/runner.js

@@ -0,0 +1,325 @@
+const { KnexTimeoutError } = require('../util/timeout');
+const { timeout } = require('../util/timeout');
+const {
+  ensureConnectionCallback,
+  ensureConnectionStreamCallback,
+} = require('./internal/ensure-connection-callback');
+
+let Transform;
+
+// The "Runner" constructor takes a "builder" (query, schema, or raw)
+// and runs through each of the query statements, calling any additional
+// "output" method provided alongside the query and bindings.
+class Runner {
+  constructor(client, builder) {
+    this.client = client;
+    this.builder = builder;
+    this.queries = [];
+
+    // The "connection" object is set on the runner when
+    // "run" is called.
+    this.connection = undefined;
+  }
+
+  // "Run" the target, calling "toSQL" on the builder, returning
+  // an object or array of queries to run, each of which are run on
+  // a single connection.
+  async run() {
+    const runner = this;
+    try {
+      const res = await this.ensureConnection(ensureConnectionCallback);
+
+      // Fire a single "end" event on the builder when
+      // all queries have successfully completed.
+      runner.builder.emit('end');
+      return res;
+
+      // If there are any "error" listeners, we fire an error event
+      // and then re-throw the error to be eventually handled by
+      // the promise chain. Useful if you're wrapping in a custom `Promise`.
+    } catch (err) {
+      if (runner.builder._events && runner.builder._events.error) {
+        runner.builder.emit('error', err);
+      }
+      throw err;
+    }
+  }
+
+  // Stream the result set, by passing through to the dialect's streaming
+  // capabilities. If the options are
+  stream(optionsOrHandler, handlerOrNil) {
+    const firstOptionIsHandler =
+      typeof optionsOrHandler === 'function' && arguments.length === 1;
+
+    const options = firstOptionIsHandler ? {} : optionsOrHandler;
+    const handler = firstOptionIsHandler ? optionsOrHandler : handlerOrNil;
+
+    // Determines whether we emit an error or throw here.
+    const hasHandler = typeof handler === 'function';
+
+    // Lazy-load the "Transform" dependency.
+    Transform = Transform || require('stream').Transform;
+
+    const queryContext = this.builder.queryContext();
+
+    const stream = new Transform({
+      objectMode: true,
+      transform: (chunk, _, callback) => {
+        callback(null, this.client.postProcessResponse(chunk, queryContext));
+      },
+    });
+    stream.on('close', () => {
+      this.client.releaseConnection(this.connection);
+    });
+
+    // If the stream is manually destroyed, the close event is not
+    // propagated to the top of the pipe chain. We need to manually verify
+    // that the source stream is closed and if not, manually destroy it.
+    stream.on('pipe', (sourceStream) => {
+      const cleanSourceStream = () => {
+        if (!sourceStream.closed) {
+          sourceStream.destroy();
+        }
+      };
+
+      // Stream already closed, cleanup immediately
+      if (stream.closed) {
+        cleanSourceStream();
+      } else {
+        stream.on('close', cleanSourceStream);
+      }
+    });
+
+    const connectionAcquirePromise = this.ensureConnection(
+      ensureConnectionStreamCallback,
+      {
+        options,
+        hasHandler,
+        stream,
+      }
+    )
+      // Emit errors on the stream if the error occurred before a connection
+      // could be acquired.
+      // If the connection was acquired, assume the error occurred in the client
+      // code and has already been emitted on the stream. Don't emit it twice.
+      .catch((err) => {
+        if (!this.connection) {
+          stream.emit('error', err);
+        }
+      });
+
+    // If a function is passed to handle the stream, send the stream
+    // there and return the promise, otherwise just return the stream
+    // and the promise will take care of itself.
+    if (hasHandler) {
+      handler(stream);
+      return connectionAcquirePromise;
+    }
+    return stream;
+  }
+
+  // Allow you to pipe the stream to a writable stream.
+  pipe(writable, options) {
+    return this.stream(options).pipe(writable);
+  }
+
+  // "Runs" a query, returning a promise. All queries specified by the builder are guaranteed
+  // to run in sequence, and on the same connection, especially helpful when schema building
+  // and dealing with foreign key constraints, etc.
+  async query(obj) {
+    const { __knexUid, __knexTxId } = this.connection;
+
+    this.builder.emit('query', Object.assign({ __knexUid, __knexTxId }, obj));
+
+    const runner = this;
+    const queryContext = this.builder.queryContext();
+    // query-error events are emitted before the queryPromise continuations.
+    // pass queryContext into client.query so it can be raised properly.
+    if (obj !== null && typeof obj === 'object') {
+      obj.queryContext = queryContext;
+    }
+    let queryPromise = this.client.query(this.connection, obj);
+
+    if (obj.timeout) {
+      queryPromise = timeout(queryPromise, obj.timeout);
+    }
+
+    // Await the return value of client.processResponse; in the case of sqlite3's
+    // dropColumn()/renameColumn(), it will be a Promise for the transaction
+    // containing the complete rename procedure.
+    return queryPromise
+      .then((resp) => this.client.processResponse(resp, runner))
+      .then((processedResponse) => {
+        const postProcessedResponse = this.client.postProcessResponse(
+          processedResponse,
+          queryContext
+        );
+
+        this.builder.emit(
+          'query-response',
+          postProcessedResponse,
+          Object.assign({ __knexUid, __knexTxId }, obj),
+          this.builder
+        );
+
+        this.client.emit(
+          'query-response',
+          postProcessedResponse,
+          Object.assign({ __knexUid, __knexTxId }, obj),
+          this.builder
+        );
+
+        return postProcessedResponse;
+      })
+      .catch((error) => {
+        if (!(error instanceof KnexTimeoutError)) {
+          return Promise.reject(error);
+        }
+        const { timeout, sql, bindings } = obj;
+
+        let cancelQuery;
+        if (obj.cancelOnTimeout) {
+          cancelQuery = this.client.cancelQuery(this.connection);
+        } else {
+          // If we don't cancel the query, we need to mark the connection as disposed so that
+          // it gets destroyed by the pool and is never used again. If we don't do this and
+          // return the connection to the pool, it will be useless until the current operation
+          // that timed out, finally finishes.
+          this.connection.__knex__disposed = error;
+          cancelQuery = Promise.resolve();
+        }
+
+        return cancelQuery
+          .catch((cancelError) => {
+            // If the cancellation failed, we need to mark the connection as disposed so that
+            // it gets destroyed by the pool and is never used again. If we don't do this and
+            // return the connection to the pool, it will be useless until the current operation
+            // that timed out, finally finishes.
+            this.connection.__knex__disposed = error;
+
+            // cancellation failed
+            throw Object.assign(cancelError, {
+              message: `After query timeout of ${timeout}ms exceeded, cancelling of query failed.`,
+              sql,
+              bindings,
+              timeout,
+            });
+          })
+          .then(() => {
+            // cancellation succeeded, rethrow timeout error
+            throw Object.assign(error, {
+              message: `Defined query timeout of ${timeout}ms exceeded when running query.`,
+              sql,
+              bindings,
+              timeout,
+            });
+          });
+      })
+      .catch((error) => {
+        this.builder.emit(
+          'query-error',
+          error,
+          Object.assign({ __knexUid, __knexTxId, queryContext }, obj)
+        );
+        throw error;
+      });
+  }
+
+  // In the case of the "schema builder" we call `queryArray`, which runs each
+  // of the queries in sequence.
+  async queryArray(queries) {
+    if (queries.length === 1) {
+      const query = queries[0];
+
+      if (!query.statementsProducer) {
+        return this.query(query);
+      }
+
+      const statements = await query.statementsProducer(
+        undefined,
+        this.connection
+      );
+
+      const sqlQueryObjects = statements.sql.map((statement) => ({
+        sql: statement,
+        bindings: query.bindings,
+      }));
+      const preQueryObjects = statements.pre.map((statement) => ({
+        sql: statement,
+        bindings: query.bindings,
+      }));
+      const postQueryObjects = statements.post.map((statement) => ({
+        sql: statement,
+        bindings: query.bindings,
+      }));
+
+      let results = [];
+
+      await this.queryArray(preQueryObjects);
+
+      try {
+        await this.client.transaction(
+          async (trx) => {
+            const transactionRunner = new Runner(trx.client, this.builder);
+            transactionRunner.connection = this.connection;
+
+            results = await transactionRunner.queryArray(sqlQueryObjects);
+
+            if (statements.check) {
+              const foreignViolations = await trx.raw(statements.check);
+
+              if (foreignViolations.length > 0) {
+                throw new Error('FOREIGN KEY constraint failed');
+              }
+            }
+          },
+          { connection: this.connection }
+        );
+      } finally {
+        await this.queryArray(postQueryObjects);
+      }
+
+      return results;
+    }
+
+    const results = [];
+    for (const query of queries) {
+      results.push(await this.queryArray([query]));
+    }
+    return results;
+  }
+
+  // Check whether there's a transaction flag, and that it has a connection.
+  async ensureConnection(cb, cbParams) {
+    // Use override from a builder if passed
+    if (this.builder._connection) {
+      this.connection = this.builder._connection;
+    }
+
+    if (this.connection) {
+      return cb(this, cbParams);
+    }
+
+    let acquiredConnection;
+    try {
+      acquiredConnection = await this.client.acquireConnection();
+    } catch (error) {
+      if (!(error instanceof KnexTimeoutError)) {
+        return Promise.reject(error);
+      }
+      if (this.builder) {
+        error.sql = this.builder.sql;
+        error.bindings = this.builder.bindings;
+      }
+      throw error;
+    }
+    try {
+      this.connection = acquiredConnection;
+      return await cb(this, cbParams);
+    } finally {
+      await this.client.releaseConnection(acquiredConnection);
+    }
+  }
+}
+
+module.exports = Runner;

backend/apis/nodejs/node_modules/knex/lib/execution/transaction.js

@@ -0,0 +1,413 @@
+// Transaction
+// -------
+const { EventEmitter } = require('events');
+const Debug = require('debug');
+const uniqueId = require('lodash/uniqueId');
+const { callbackify } = require('util');
+
+const makeKnex = require('../knex-builder/make-knex');
+const { timeout, KnexTimeoutError } = require('../util/timeout');
+const finallyMixin = require('../util/finally-mixin');
+
+const debug = Debug('knex:tx');
+
+// FYI: This is defined as a function instead of a constant so that
+//      each Transactor can have its own copy of the default config.
+//      This will minimize the impact of bugs that might be introduced
+//      if a Transactor ever mutates its config.
+function DEFAULT_CONFIG() {
+  return {
+    userParams: {},
+    doNotRejectOnRollback: true,
+  };
+}
+// These aren't supported in sqlite3 which is serialized already so it's as
+// safe as reasonable, except for a special read_uncommitted pragma
+const validIsolationLevels = [
+  // Doesn't really work in postgres, it treats it as read committed
+  'read uncommitted',
+  'read committed',
+  'snapshot',
+  // snapshot and repeatable read are basically the same, most "repeatable
+  // read" implementations are actually "snapshot" also known as Multi Version
+  // Concurrency Control (MVCC). Mssql's repeatable read doesn't stop
+  // repeated reads for inserts as it uses a pessimistic locking system so
+  // you should probably use 'snapshot' to stop read skew.
+  'repeatable read',
+  // mysql pretends to have serializable, but it is not
+  'serializable',
+];
+
+// Acts as a facade for a Promise, keeping the internal state
+// and managing any child transactions.
+class Transaction extends EventEmitter {
+  constructor(client, container, config = DEFAULT_CONFIG(), outerTx = null) {
+    super();
+    this.userParams = config.userParams;
+    this.doNotRejectOnRollback = config.doNotRejectOnRollback;
+
+    const txid = (this.txid = uniqueId('trx'));
+
+    this.client = client;
+    this.logger = client.logger;
+    this.outerTx = outerTx;
+    this.trxClient = undefined;
+    this._completed = false;
+    this._debug = client.config && client.config.debug;
+
+    this.readOnly = config.readOnly;
+    if (config.isolationLevel) {
+      this.setIsolationLevel(config.isolationLevel);
+    }
+
+    debug(
+      '%s: Starting %s transaction',
+      txid,
+      outerTx ? 'nested' : 'top level'
+    );
+
+    // `this` can potentially serve as an `outerTx` for another
+    // Transaction.  So, go ahead and establish `_lastChild` now.
+    this._lastChild = Promise.resolve();
+
+    const _previousSibling = outerTx ? outerTx._lastChild : Promise.resolve();
+
+    // FYI: As you will see in a moment, this Promise will be used to construct
+    //      2 separate Promise Chains.  This ensures that each Promise Chain
+    //      can establish its error-handling semantics without interfering
+    //      with the other Promise Chain.
+    const basePromise = _previousSibling.then(() =>
+      this._evaluateContainer(config, container)
+    );
+
+    // FYI: This is the Promise Chain for EXTERNAL use.  It ensures that the
+    //      caller must handle any exceptions that result from `basePromise`.
+    this._promise = basePromise.then((x) => x);
+
+    if (outerTx) {
+      // FYI: This is the Promise Chain for INTERNAL use.  It serves as a signal
+      //      for when the next sibling should begin its execution.  Therefore,
+      //      exceptions are caught and ignored.
+      outerTx._lastChild = basePromise.catch(() => {});
+    }
+  }
+
+  isCompleted() {
+    return (
+      this._completed || (this.outerTx && this.outerTx.isCompleted()) || false
+    );
+  }
+
+  begin(conn) {
+    const trxMode = [
+      this.isolationLevel ? `ISOLATION LEVEL ${this.isolationLevel}` : '',
+      this.readOnly ? 'READ ONLY' : '',
+    ]
+      .join(' ')
+      .trim();
+
+    if (trxMode.length === 0) {
+      return this.query(conn, 'BEGIN;');
+    }
+
+    return this.query(conn, `SET TRANSACTION ${trxMode};`).then(() =>
+      this.query(conn, 'BEGIN;')
+    );
+  }
+
+  savepoint(conn) {
+    return this.query(conn, `SAVEPOINT ${this.txid};`);
+  }
+
+  commit(conn, value) {
+    return this.query(conn, 'COMMIT;', 1, value);
+  }
+
+  release(conn, value) {
+    return this.query(conn, `RELEASE SAVEPOINT ${this.txid};`, 1, value);
+  }
+
+  setIsolationLevel(isolationLevel) {
+    if (!validIsolationLevels.includes(isolationLevel)) {
+      throw new Error(
+        `Invalid isolationLevel, supported isolation levels are: ${JSON.stringify(
+          validIsolationLevels
+        )}`
+      );
+    }
+    this.isolationLevel = isolationLevel;
+    return this;
+  }
+
+  rollback(conn, error) {
+    return timeout(this.query(conn, 'ROLLBACK', 2, error), 5000).catch(
+      (err) => {
+        if (!(err instanceof KnexTimeoutError)) {
+          return Promise.reject(err);
+        }
+        this._rejecter(error);
+      }
+    );
+  }
+
+  rollbackTo(conn, error) {
+    return timeout(
+      this.query(conn, `ROLLBACK TO SAVEPOINT ${this.txid}`, 2, error),
+      5000
+    ).catch((err) => {
+      if (!(err instanceof KnexTimeoutError)) {
+        return Promise.reject(err);
+      }
+      this._rejecter(error);
+    });
+  }
+
+  query(conn, sql, status, value) {
+    const q = this.trxClient
+      .query(conn, sql)
+      .catch((err) => {
+        status = 2;
+        value = err;
+        this._completed = true;
+        debug('%s error running transaction query', this.txid);
+      })
+      .then((res) => {
+        if (status === 1) {
+          this._resolver(value);
+        }
+        if (status === 2) {
+          if (value === undefined) {
+            if (this.doNotRejectOnRollback && /^ROLLBACK\b/i.test(sql)) {
+              this._resolver();
+              return;
+            }
+
+            value = new Error(`Transaction rejected with non-error: ${value}`);
+          }
+          this._rejecter(value);
+        }
+        return res;
+      });
+    if (status === 1 || status === 2) {
+      this._completed = true;
+    }
+    return q;
+  }
+
+  debug(enabled) {
+    this._debug = arguments.length ? enabled : true;
+    return this;
+  }
+
+  async _evaluateContainer(config, container) {
+    return this.acquireConnection(config, (connection) => {
+      const trxClient = (this.trxClient = makeTxClient(
+        this,
+        this.client,
+        connection
+      ));
+      const init = this.client.transacting
+        ? this.savepoint(connection)
+        : this.begin(connection);
+      const executionPromise = new Promise((resolver, rejecter) => {
+        this._resolver = resolver;
+        this._rejecter = rejecter;
+      });
+
+      init
+        .then(() => {
+          return makeTransactor(this, connection, trxClient);
+        })
+        .then((transactor) => {
+          this.transactor = transactor;
+          if (this.outerTx) {
+            transactor.parentTransaction = this.outerTx.transactor;
+          }
+          transactor.executionPromise = executionPromise;
+
+          // If we've returned a "thenable" from the transaction container, assume
+          // the rollback and commit are chained to this object's success / failure.
+          // Directly thrown errors are treated as automatic rollbacks.
+          let result;
+          try {
+            result = container(transactor);
+          } catch (err) {
+            result = Promise.reject(err);
+          }
+          if (result && result.then && typeof result.then === 'function') {
+            result
+              .then((val) => {
+                return transactor.commit(val);
+              })
+              .catch((err) => {
+                return transactor.rollback(err);
+              });
+          }
+          return null;
+        })
+        .catch((e) => {
+          return this._rejecter(e);
+        });
+
+      return executionPromise;
+    });
+  }
+
+  // Acquire a connection and create a disposer - either using the one passed
+  // via config or getting one off the client. The disposer will be called once
+  // the original promise is marked completed.
+  async acquireConnection(config, cb) {
+    const configConnection = config && config.connection;
+    const connection =
+      configConnection || (await this.client.acquireConnection());
+
+    try {
+      connection.__knexTxId = this.txid;
+      return await cb(connection);
+    } finally {
+      if (!configConnection) {
+        debug('%s: releasing connection', this.txid);
+        this.client.releaseConnection(connection);
+      } else {
+        debug('%s: not releasing external connection', this.txid);
+      }
+    }
+  }
+
+  then(onResolve, onReject) {
+    return this._promise.then(onResolve, onReject);
+  }
+
+  catch(...args) {
+    return this._promise.catch(...args);
+  }
+
+  asCallback(cb) {
+    callbackify(() => this._promise)(cb);
+    return this._promise;
+  }
+}
+finallyMixin(Transaction.prototype);
+
+// The transactor is a full featured knex object, with a "commit", a "rollback"
+// and a "savepoint" function. The "savepoint" is just sugar for creating a new
+// transaction. If the rollback is run inside a savepoint, it rolls back to the
+// last savepoint - otherwise it rolls back the transaction.
+function makeTransactor(trx, connection, trxClient) {
+  const transactor = makeKnex(trxClient);
+
+  transactor.context.withUserParams = () => {
+    throw new Error(
+      'Cannot set user params on a transaction - it can only inherit params from main knex instance'
+    );
+  };
+
+  transactor.isTransaction = true;
+  transactor.userParams = trx.userParams || {};
+
+  transactor.context.transaction = function (container, options) {
+    if (!options) {
+      options = { doNotRejectOnRollback: true };
+    } else if (options.doNotRejectOnRollback === undefined) {
+      options.doNotRejectOnRollback = true;
+    }
+
+    return this._transaction(container, options, trx);
+  };
+
+  transactor.savepoint = function (container, options) {
+    return transactor.transaction(container, options);
+  };
+
+  if (trx.client.transacting) {
+    transactor.commit = (value) => trx.release(connection, value);
+    transactor.rollback = (error) => trx.rollbackTo(connection, error);
+  } else {
+    transactor.commit = (value) => trx.commit(connection, value);
+    transactor.rollback = (error) => trx.rollback(connection, error);
+  }
+
+  transactor.isCompleted = () => trx.isCompleted();
+
+  return transactor;
+}
+
+// We need to make a client object which always acquires the same
+// connection and does not release back into the pool.
+function makeTxClient(trx, client, connection) {
+  const trxClient = Object.create(client.constructor.prototype);
+  trxClient.version = client.version;
+  trxClient.config = client.config;
+  trxClient.driver = client.driver;
+  trxClient.connectionSettings = client.connectionSettings;
+  trxClient.transacting = true;
+  trxClient.valueForUndefined = client.valueForUndefined;
+  trxClient.logger = client.logger;
+
+  trxClient.on('start', function (arg) {
+    trx.emit('start', arg);
+    client.emit('start', arg);
+  });
+
+  trxClient.on('query', function (arg) {
+    trx.emit('query', arg);
+    client.emit('query', arg);
+  });
+
+  trxClient.on('query-error', function (err, obj) {
+    trx.emit('query-error', err, obj);
+    client.emit('query-error', err, obj);
+  });
+
+  trxClient.on('query-response', function (response, obj, builder) {
+    trx.emit('query-response', response, obj, builder);
+    client.emit('query-response', response, obj, builder);
+  });
+
+  const _query = trxClient.query;
+  trxClient.query = function (conn, obj) {
+    const completed = trx.isCompleted();
+    return new Promise(function (resolve, reject) {
+      try {
+        if (conn !== connection)
+          throw new Error('Invalid connection for transaction query.');
+        if (completed) completedError(trx, obj);
+        resolve(_query.call(trxClient, conn, obj));
+      } catch (e) {
+        reject(e);
+      }
+    });
+  };
+  const _stream = trxClient.stream;
+  trxClient.stream = function (conn, obj, stream, options) {
+    const completed = trx.isCompleted();
+    return new Promise(function (resolve, reject) {
+      try {
+        if (conn !== connection)
+          throw new Error('Invalid connection for transaction query.');
+        if (completed) completedError(trx, obj);
+        resolve(_stream.call(trxClient, conn, obj, stream, options));
+      } catch (e) {
+        reject(e);
+      }
+    });
+  };
+  trxClient.acquireConnection = function () {
+    return Promise.resolve(connection);
+  };
+  trxClient.releaseConnection = function () {
+    return Promise.resolve();
+  };
+
+  return trxClient;
+}
+
+function completedError(trx, obj) {
+  const sql = typeof obj === 'string' ? obj : obj && obj.sql;
+  debug('%s: Transaction completed: %s', trx.txid, sql);
+  throw new Error(
+    'Transaction query already complete, run with DEBUG=knex:tx for more info'
+  );
+}
+
+module.exports = Transaction;