Step one, move up to pod root

app/pods/protected/strains/measurements-table-row/component.js

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+import Ember from 'ember';
+import ajaxError from '../../../../../utils/ajax-error';
+
+const { Component } = Ember;
+
+export default Component.extend({
+  tagName: 'tr',
+  isEditing: false,
+
+  oldCharacteristicId: function() {
+    let json = this.get('row').toJSON();
+    return json.characteristic;
+  }.property(),
+
+  rowChanged: Ember.computed('row.notes', 'row.value', 'row.characteristic.id', function() {
+    return this.get('row.hasDirtyAttributes') ||
+      this.get('oldCharacteristicId') !== this.get('row.characteristic.id');
+  }),
+
+  actions: {
+    edit: function() {
+      // The parent table fetches all of the characteristics ahead of time
+      this.set('characteristics', this.store.peekAll('characteristic'));
+      this.toggleProperty('isEditing');
+    },
+
+    save: function() {
+      if (this.get('rowChanged')) {
+        this.get('row').save().then(() => {
+          this.get('flashMessages').clearMessages();
+          this.toggleProperty('isEditing');
+        }, () => {
+          ajaxError(this.get('row.errors'), this.get('flashMessages'));
+        });
+      } else {
+        this.toggleProperty('isEditing');
+      }
+    },
+
+    delete: function() {
+      let char = this.get('row.characteristic');
+      if (char.get('isNew')) {
+        char.destroyRecord();
+      }
+      this.get('row').destroyRecord();
+    }
+
+  },
+});

app/pods/protected/strains/measurements-table-row/template.hbs

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+{{#if isEditing}}
+  <td></td>
+  <td>
+    {{
+      select-2
+      multiple=false
+      content=characteristics
+      value=row.characteristic
+      optionLabelPath="characteristicName"
+    }}
+  </td>
+  <td>
+    {{input value=row.value}}
+  </td>
+  <td>
+    {{input value=row.notes}}
+  </td>
+  {{#if canEdit}}
+    <td>
+      {{#if rowChanged}}
+      <button class="button-green smaller" {{action 'save'}}>
+        Save
+      </button>
+      {{else}}
+      <button class="button-gray smaller" {{action 'save'}}>
+        Cancel
+      </button>
+      {{/if}}
+    </td>
+  {{/if}}
+{{else}}
+  <td>
+    {{{row.characteristic.characteristicTypeName}}}
+  </td>
+  <td>
+    {{#link-to 'protected.characteristics.show' row.characteristic.id}}
+      {{{row.characteristic.characteristicName}}}
+    {{/link-to}}
+  </td>
+  <td>
+    {{row.value}}
+  </td>
+  <td>
+    {{row.notes}}
+  </td>
+  {{#if canEdit}}
+    <td>
+      <button class="button-gray smaller" {{action 'edit'}}>
+        Edit
+      </button>
+      {{delete-button delete=(action 'delete')}}
+    </td>
+  {{/if}}
+{{/if}}