diff --git a/package-lock.json b/package-lock.json
index a5e8377..d2d0c8b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "dexie-relationships",
-  "version": "1.2.9",
+  "version": "1.2.10",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -10,7 +10,7 @@
       "integrity": "sha1-KeGOYy5g5OIh1YECR4UqY9ey5BA=",
       "dev": true,
       "requires": {
-        "xtend": "3.0.0"
+        "xtend": "~3.0.0"
       },
       "dependencies": {
         "xtend": {
@@ -39,7 +39,7 @@
       "integrity": "sha1-r9+UiPsezvyDSPb7IvRk4ypYs2s=",
       "dev": true,
       "requires": {
-        "acorn": "3.3.0"
+        "acorn": "^3.0.4"
       }
     },
     "acorn-object-spread": {
@@ -48,7 +48,7 @@
       "integrity": "sha1-SOrQ9KjrFplaF6Dbn/xqyq2kumg=",
       "dev": true,
       "requires": {
-        "acorn": "3.3.0"
+        "acorn": "^3.1.0"
       }
     },
     "ajv": {
@@ -57,8 +57,8 @@
       "integrity": "sha1-gv+wKynmYq5TvcIK8VlHcGc5xTY=",
       "dev": true,
       "requires": {
-        "co": "4.6.0",
-        "json-stable-stringify": "1.0.1"
+        "co": "^4.6.0",
+        "json-stable-stringify": "^1.0.1"
       }
     },
     "ajv-keywords": {
@@ -73,11 +73,17 @@
       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
       "dev": true,
       "requires": {
-        "kind-of": "3.2.2",
-        "longest": "1.0.1",
-        "repeat-string": "1.6.1"
+        "kind-of": "^3.0.2",
+        "longest": "^1.0.1",
+        "repeat-string": "^1.5.2"
       }
     },
+    "ansi-colors": {
+      "version": "3.2.3",
+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.2.3.tgz",
+      "integrity": "sha512-LEHHyuhlPY3TmuUYMh2oz89lTShfvgbmzaBcxve9t/9Wuy7Dwf4yoAKcND7KFT1HAQfqZ12qtc+DUrBMeKF9nw==",
+      "dev": true
+    },
     "ansi-escapes": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-1.4.0.tgz",
@@ -97,36 +103,21 @@
       "dev": true
     },
     "argparse": {
-      "version": "1.0.9",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.9.tgz",
-      "integrity": "sha1-c9g7wmP4bpf4zE9rrhsOkKfSLIY=",
-      "dev": true,
-      "requires": {
-        "sprintf-js": "1.0.3"
-      }
-    },
-    "arr-diff": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-2.0.0.tgz",
-      "integrity": "sha1-jzuCf5Vai9ZpaX5KQlasPOrjVs8=",
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
+      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
       "dev": true,
       "requires": {
-        "arr-flatten": "1.1.0"
+        "sprintf-js": "~1.0.2"
       }
     },
-    "arr-flatten": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/arr-flatten/-/arr-flatten-1.1.0.tgz",
-      "integrity": "sha512-L3hKV5R/p5o81R7O02IGnwpDmkp6E982XhtbuwSe3O4qOtMMMtodicASA1Cny2U+aCXcNpml+m4dPsvsJ3jatg==",
-      "dev": true
-    },
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       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/array-union/-/array-union-1.0.2.tgz",
       "integrity": "sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=",
       "dev": true,
       "requires": {
-        "array-uniq": "1.0.3"
+        "array-uniq": "^1.0.1"
       }
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@@ -135,12 +126,6 @@
       "integrity": "sha1-r2rId6Jcx/dOBYiUdThY39sk/bY=",
       "dev": true
     },
-    "array-unique": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.2.1.tgz",
-      "integrity": "sha1-odl8yvy8JiXMcPrc6zalDFiwGlM=",
-      "dev": true
-    },
     "arrify": {
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       "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz",
@@ -153,9 +138,9 @@
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       "dev": true,
       "requires": {
-        "bn.js": "4.11.8",
-        "inherits": "2.0.3",
-        "minimalistic-assert": "1.0.0"
+        "bn.js": "^4.0.0",
+        "inherits": "^2.0.1",
+        "minimalistic-assert": "^1.0.0"
       }
     },
     "assertion-error": {
@@ -171,9 +156,9 @@
       "dev": true
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     "atob": {
-      "version": "2.0.3",
-      "resolved": "https://registry.npmjs.org/atob/-/atob-2.0.3.tgz",
-      "integrity": "sha1-GcenYEc3dEaPILLS0DNyrX1Mv10=",
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.2.tgz",
+      "integrity": "sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg==",
       "dev": true
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@@ -182,9 +167,9 @@
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       "dev": true,
       "requires": {
-        "chalk": "1.1.3",
-        "esutils": "2.0.2",
-        "js-tokens": "3.0.2"
+        "chalk": "^1.1.3",
+        "esutils": "^2.0.2",
+        "js-tokens": "^3.0.2"
       }
     },
     "balanced-match": {
@@ -199,7 +184,7 @@
       "integrity": "sha1-yba8oI0bwuoA/Ir7Txpf0eHGbk4=",
       "dev": true,
       "requires": {
-        "readable-stream": "1.0.34"
+        "readable-stream": "~1.0.26"
       },
       "dependencies": {
         "isarray": {
@@ -214,10 +199,10 @@
           "integrity": "sha1-Elgg40vIQtLyqq+v5MKRbuMsFXw=",
           "dev": true,
           "requires": {
-            "core-util-is": "1.0.2",
-            "inherits": "2.0.3",
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.1",
             "isarray": "0.0.1",
-            "string_decoder": "0.10.31"
+            "string_decoder": "~0.10.x"
           }
         },
         "string_decoder": {
@@ -240,21 +225,10 @@
       "integrity": "sha1-wHshHHyVLsH479Uad+8NHTmQopI=",
       "dev": true,
       "requires": {
-        "balanced-match": "1.0.0",
+        "balanced-match": "^1.0.0",
         "concat-map": "0.0.1"
       }
     },
-    "braces": {
-      "version": "1.8.5",
-      "resolved": "https://registry.npmjs.org/braces/-/braces-1.8.5.tgz",
-      "integrity": "sha1-uneWLhLf+WnWt2cR6RS3N4V79qc=",
-      "dev": true,
-      "requires": {
-        "expand-range": "1.8.2",
-        "preserve": "0.2.0",
-        "repeat-element": "1.1.2"
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     "brorand": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/brorand/-/brorand-1.1.0.tgz",
@@ -262,9 +236,9 @@
       "dev": true
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-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.0.tgz",
-      "integrity": "sha1-81HTKWnTL6XXpVZxVCY9korjvR8=",
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.1.tgz",
+      "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==",
       "dev": true
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@@ -273,12 +247,12 @@
       "integrity": "sha512-UGnTYAnB2a3YuYKIRy1/4FB2HdM866E0qC46JXvVTYKlBlZlnvfpSfY6OKfXZAkv70eJ2a1SqzpAo5CRhZGDFg==",
       "dev": true,
       "requires": {
-        "buffer-xor": "1.0.3",
-        "cipher-base": "1.0.4",
-        "create-hash": "1.1.3",
-        "evp_bytestokey": "1.0.3",
-        "inherits": "2.0.3",
-        "safe-buffer": "5.1.1"
+        "buffer-xor": "^1.0.3",
+        "cipher-base": "^1.0.0",
+        "create-hash": "^1.1.0",
+        "evp_bytestokey": "^1.0.3",
+        "inherits": "^2.0.1",
+        "safe-buffer": "^5.0.1"
       }
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     "browserify-cipher": {
@@ -287,9 +261,9 @@
       "integrity": "sha1-mYgkSHS/XtTijalWZtzWasj8Njo=",
       "dev": true,
       "requires": {
-        "browserify-aes": "1.1.1",
-        "browserify-des": "1.0.0",
-        "evp_bytestokey": "1.0.3"
+        "browserify-aes": "^1.0.4",
+        "browserify-des": "^1.0.0",
+        "evp_bytestokey": "^1.0.0"
       }
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     "browserify-des": {
@@ -298,9 +272,9 @@
       "integrity": "sha1-2qJ3cXRwki7S/hhZQRihdUOXId0=",
       "dev": true,
       "requires": {
-        "cipher-base": "1.0.4",
-        "des.js": "1.0.0",
-        "inherits": "2.0.3"
+        "cipher-base": "^1.0.1",
+        "des.js": "^1.0.0",
+        "inherits": "^2.0.1"
       }
     },
     "browserify-fs": {
@@ -309,9 +283,9 @@
       "integrity": "sha1-8HWqinKdTRcW0GZiDjhvzBMRqW8=",
       "dev": true,
       "requires": {
-        "level-filesystem": "1.2.0",
-        "level-js": "2.2.4",
-        "levelup": "0.18.6"
+        "level-filesystem": "^1.0.1",
+        "level-js": "^2.1.3",
+        "levelup": "^0.18.2"
       }
     },
     "browserify-rsa": {
@@ -320,8 +294,8 @@
       "integrity": "sha1-IeCr+vbyApzy+vsTNWenAdQTVSQ=",
       "dev": true,
       "requires": {
-        "bn.js": "4.11.8",
-        "randombytes": "2.0.6"
+        "bn.js": "^4.1.0",
+        "randombytes": "^2.0.1"
       }
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     "browserify-sign": {
@@ -330,13 +304,13 @@
       "integrity": "sha1-qk62jl17ZYuqa/alfmMMvXqT0pg=",
       "dev": true,
       "requires": {
-        "bn.js": "4.11.8",
-        "browserify-rsa": "4.0.1",
-        "create-hash": "1.1.3",
-        "create-hmac": "1.1.6",
-        "elliptic": "6.4.0",
-        "inherits": "2.0.3",
-        "parse-asn1": "5.1.0"
+        "bn.js": "^4.1.1",
+        "browserify-rsa": "^4.0.0",
+        "create-hash": "^1.1.0",
+        "create-hmac": "^1.1.2",
+        "elliptic": "^6.0.0",
+        "inherits": "^2.0.1",
+        "parse-asn1": "^5.0.0"
       }
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     "buble": {
@@ -345,13 +319,13 @@
       "integrity": "sha1-Z4yx/CTckOWtoEfeql3cb22omD4=",
       "dev": true,
       "requires": {
-        "acorn": "3.3.0",
-        "acorn-jsx": "3.0.1",
-        "acorn-object-spread": "1.0.0",
-        "chalk": "1.1.3",
-        "magic-string": "0.14.0",
-        "minimist": "1.2.0",
-        "os-homedir": "1.0.2"
+        "acorn": "^3.3.0",
+        "acorn-jsx": "^3.0.1",
+        "acorn-object-spread": "^1.0.0",
+        "chalk": "^1.1.3",
+        "magic-string": "^0.14.0",
+        "minimist": "^1.2.0",
+        "os-homedir": "^1.0.1"
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@@ -372,7 +346,7 @@
       "integrity": "sha1-lAhe9jWB7NPaqSREqP6U6CV3dR8=",
       "dev": true,
       "requires": {
-        "callsites": "0.2.0"
+        "callsites": "^0.2.0"
       }
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@@ -393,8 +367,8 @@
       "integrity": "sha1-qg0yYptu6XIgBBHL1EYckHvCt60=",
       "dev": true,
       "requires": {
-        "align-text": "0.1.4",
-        "lazy-cache": "1.0.4"
+        "align-text": "^0.1.3",
+        "lazy-cache": "^1.0.3"
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     "chai": {
@@ -403,9 +377,9 @@
       "integrity": "sha1-TQJjewZ/6Vi9v906QOxW/vc3Mkc=",
       "dev": true,
       "requires": {
-        "assertion-error": "1.1.0",
-        "deep-eql": "0.1.3",
-        "type-detect": "1.0.0"
+        "assertion-error": "^1.0.1",
+        "deep-eql": "^0.1.3",
+        "type-detect": "^1.0.0"
       }
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     "chalk": {
@@ -414,11 +388,11 @@
       "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
       "dev": true,
       "requires": {
-        "ansi-styles": "2.2.1",
-        "escape-string-regexp": "1.0.5",
-        "has-ansi": "2.0.0",
-        "strip-ansi": "3.0.1",
-        "supports-color": "2.0.0"
+        "ansi-styles": "^2.2.1",
+        "escape-string-regexp": "^1.0.2",
+        "has-ansi": "^2.0.0",
+        "strip-ansi": "^3.0.0",
+        "supports-color": "^2.0.0"
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@@ -427,8 +401,8 @@
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       "dev": true,
       "requires": {
-        "inherits": "2.0.3",
-        "safe-buffer": "5.1.1"
+        "inherits": "^2.0.1",
+        "safe-buffer": "^5.0.1"
       }
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     "circular-json": {
@@ -443,7 +417,7 @@
       "integrity": "sha1-ZNo/fValRBLll5S9Ytw1KV6PKYc=",
       "dev": true,
       "requires": {
-        "restore-cursor": "1.0.1"
+        "restore-cursor": "^1.0.1"
       }
     },
     "cli-width": {
@@ -458,8 +432,8 @@
       "integrity": "sha1-S0dXYP+AJkx2LDoXGQMukcf+oNE=",
       "dev": true,
       "requires": {
-        "center-align": "0.1.3",
-        "right-align": "0.1.3",
+        "center-align": "^0.1.1",
+        "right-align": "^0.1.1",
         "wordwrap": "0.0.2"
       },
       "dependencies": {
@@ -489,15 +463,21 @@
       "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=",
       "dev": true
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-      "version": "2.9.0",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-2.9.0.tgz",
-      "integrity": "sha1-nJkJQXbhIkDLItbFFGCYQA/g99Q=",
+    "color-convert": {
+      "version": "1.9.3",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
+      "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
       "dev": true,
       "requires": {
-        "graceful-readlink": "1.0.1"
+        "color-name": "1.1.3"
       }
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+    "color-name": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
+      "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
+      "dev": true
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       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
@@ -510,9 +490,9 @@
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       "dev": true,
       "requires": {
-        "inherits": "2.0.3",
-        "readable-stream": "2.3.3",
-        "typedarray": "0.0.6"
+        "inherits": "^2.0.3",
+        "readable-stream": "^2.2.2",
+        "typedarray": "^0.0.6"
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@@ -527,8 +507,8 @@
       "integrity": "sha1-iIxyNZbN92EvZJgjPuvXo1MBc30=",
       "dev": true,
       "requires": {
-        "bn.js": "4.11.8",
-        "elliptic": "6.4.0"
+        "bn.js": "^4.1.0",
+        "elliptic": "^6.0.0"
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@@ -537,10 +517,10 @@
       "integrity": "sha1-YGBCrIuSYnUPSDyt2rD1gZFy2P0=",
       "dev": true,
       "requires": {
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-        "inherits": "2.0.3",
-        "ripemd160": "2.0.1",
-        "sha.js": "2.4.9"
+        "cipher-base": "^1.0.1",
+        "inherits": "^2.0.1",
+        "ripemd160": "^2.0.0",
+        "sha.js": "^2.4.0"
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@@ -549,12 +529,12 @@
       "integrity": "sha1-rLniIaThe9sHbpBlfEK5PjcmzwY=",
       "dev": true,
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-        "inherits": "2.0.3",
-        "ripemd160": "2.0.1",
-        "safe-buffer": "5.1.1",
-        "sha.js": "2.4.9"
+        "cipher-base": "^1.0.3",
+        "create-hash": "^1.1.0",
+        "inherits": "^2.0.1",
+        "ripemd160": "^2.0.0",
+        "safe-buffer": "^5.0.1",
+        "sha.js": "^2.4.8"
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     "crypto-browserify": {
@@ -563,17 +543,17 @@
       "integrity": "sha512-fz4spIh+znjO2VjL+IdhEpRJ3YN6sMzITSBijk6FK2UvTqruSQW+/cCZTSNsMiZNvUeq0CqurF+dAbyiGOY6Wg==",
       "dev": true,
       "requires": {
-        "browserify-cipher": "1.0.0",
-        "browserify-sign": "4.0.4",
-        "create-ecdh": "4.0.0",
-        "create-hash": "1.1.3",
-        "create-hmac": "1.1.6",
-        "diffie-hellman": "5.0.2",
-        "inherits": "2.0.3",
-        "pbkdf2": "3.0.14",
-        "public-encrypt": "4.0.0",
-        "randombytes": "2.0.6",
-        "randomfill": "1.0.3"
+        "browserify-cipher": "^1.0.0",
+        "browserify-sign": "^4.0.0",
+        "create-ecdh": "^4.0.0",
+        "create-hash": "^1.1.0",
+        "create-hmac": "^1.1.0",
+        "diffie-hellman": "^5.0.0",
+        "inherits": "^2.0.1",
+        "pbkdf2": "^3.0.3",
+        "public-encrypt": "^4.0.0",
+        "randombytes": "^2.0.0",
+        "randomfill": "^1.0.3"
       }
     },
     "d": {
@@ -582,7 +562,7 @@
       "integrity": "sha1-dUu1v+VUUdpppYuU1F9MWwRi1Y8=",
       "dev": true,
       "requires": {
-        "es5-ext": "0.10.37"
+        "es5-ext": "^0.10.9"
       }
     },
     "debug": {
@@ -635,7 +615,24 @@
       "integrity": "sha1-LO8fER4cV4cNi7uK8mUOWHzS9bQ=",
       "dev": true,
       "requires": {
-        "abstract-leveldown": "0.12.4"
+        "abstract-leveldown": "~0.12.1"
+      }
+    },
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+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
+          "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==",
+          "dev": true
+        },
+        "cliui": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/cliui/-/cliui-5.0.0.tgz",
+          "integrity": "sha512-PYeGSEmmHM6zvoef2w8TPzlrnNpXIjTipYK780YswmIP9vjxmd6Y2a3CB2Ks6/AU8NHjZugXvo8w3oWM2qnwXA==",
+          "dev": true,
+          "requires": {
+            "string-width": "^3.1.0",
+            "strip-ansi": "^5.2.0",
+            "wrap-ansi": "^5.1.0"
+          }
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        },
+        "string-width": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
+          "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
+          "dev": true,
+          "requires": {
+            "emoji-regex": "^7.0.1",
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.1.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
+          "integrity": "sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^4.1.0"
+          }
+        },
+        "yargs": {
+          "version": "13.3.0",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.3.0.tgz",
+          "integrity": "sha512-2eehun/8ALW8TLoIl7MVaRUrg+yCnenu8B4kBlRxj3GJGDKU1Og7sMXPNm1BYyM1DOJmTZ4YeN/Nwxv+8XJsUA==",
+          "dev": true,
+          "requires": {
+            "cliui": "^5.0.0",
+            "find-up": "^3.0.0",
+            "get-caller-file": "^2.0.1",
+            "require-directory": "^2.1.1",
+            "require-main-filename": "^2.0.0",
+            "set-blocking": "^2.0.0",
+            "string-width": "^3.0.0",
+            "which-module": "^2.0.0",
+            "y18n": "^4.0.0",
+            "yargs-parser": "^13.1.1"
+          }
+        }
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 6a8019b..c457a33 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "eslint-config-standard": "^6.2.0",
     "eslint-plugin-promise": "^3.3.0",
     "eslint-plugin-standard": "^2.0.1",
-    "mocha": "^3.1.2",
+    "mocha": "^6.2.1",
     "reify": "^0.4.4",
     "rollup": "^0.37.0",
     "rollup-plugin-buble": "^0.14.0",
@@ -31,7 +31,8 @@
     "build": "./node_modules/.bin/rollup -c && ./node_modules/.bin/rollup -c rollup.minify.config.js",
     "test": "npm run eslint && npm run mocha && cd test/browser && ../../node_modules/.bin/rollup -c",
     "eslint": "./node_modules/.bin/eslint src",
-    "mocha": "./node_modules/.bin/mocha --require reify test"
+    "mocha": "./node_modules/.bin/mocha --require reify test",
+    "prepare": "npm run build"
   },
   "repository": {
     "type": "git",
diff --git a/src/index.js b/src/index.js
index f69903a..c4418cc 100644
--- a/src/index.js
+++ b/src/index.js
@@ -84,8 +84,8 @@ const Relationships = (db) => {
 
           // Build the Collection to retrieve all related items
           return databaseTables[tableName]
-              .where(foreignTable.index)
-              .anyOf(allRelatedKeys)
+            .where(foreignTable.index)
+            .anyOf(allRelatedKeys)
         })
 
       // Execute queries in parallell
@@ -119,7 +119,7 @@ const Relationships = (db) => {
           // Populate column on each row
           rows.forEach(row => {
             let foreignKey = row[targetIndex]
-            let record = lookup[foreignKey]
+            let record = lookup[foreignKey] || []
             if (foreignKey !== null && foreignKey !== undefined && !record) {
               throw new Error(
                 `Could not lookup foreign key where ` +